bzr-1.14.1 released
Changes from 1.14final to 1.14.1 *** * Change api_minimum_version back to api_minimum_version = (1, 13, 0) The Bazaar team is happy to announce availability of a new release of the bzr adaptive version control system. Thanks to everyone who contributed patches, suggestions, and feedback. Bazaar is now available for download from http://bazaar-vcs.org/ Download as a source tarball; packages for various systems will be available soon. -- Bob Tanner tan...@real-time.com Key fingerprint = F785 DDFC CF94 7CE8 AA87 3A9D 3895 26F1 0DDB E378 PGP.sig Description: This is a digitally signed message part -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
problem with money datatype based calculations in python
hello all, I am using postgresql as a database server for my db application. The database is related to accounts and point of sales and many calculations involve money datatype. The application logic is totally done in python. Now the problem is that there is a situation where we calculate tax on % of the total amount on the invoice. The percentage is in terms of float but the eventual amount has to be in a money datatype. The product cost comes in money datatype from postgresql and the tax % comes in float. So I would like to know if python supports some thing similar to money datatype so that I can cast my total amount (in money ) divided by tax% (in float ) so money divided by float should be the result and that result should be in money datatype. For example a product x has the cost Rs. 100 which is stored in the tabel as money type. and in the tax table for that product the VAT is 5% and this 5% is stored in float datatype. So after using both these values the resulting total 105Rs. should be in money type and not float. I awaite some reply, Thanks in advice. happy hacking. Krishnakant. -- http://mail.python.org/mailman/listinfo/python-list
interesting float to money conversion problem
hello all, I am using postgresql as a database server for my db application. The database is related to accounts and point of sales and many calculations involve money datatype. The application logic is totally done in python. Now the problem is that there is a situation where we calculate tax on % of the total amount on the invoice. The percentage is in terms of float but the eventual amount has to be in a money datatype. The product cost comes in money datatype from postgresql and the tax % comes in float. So I would like to know if python supports some thing similar to money datatype so that I can cast my total amount (in money ) divided by tax% (in float ) so money divided by float should be the result and that result should be in money datatype. For example a product x has the cost Rs. 100 which is stored in the tabel as money type. and in the tax table for that product the VAT is 5% and this 5% is stored in float datatype. So after using both these values the resulting total 105Rs. should be in money type and not float. I awaite some reply, Thanks in advice. happy hacking. Krishnakant. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Why bool( object )?
Steven D'Aprano st...@remove-this-cybersource.com.au writes: On Fri, 01 May 2009 15:03:30 -0700, Aaron Brady wrote: On May 1, 4:30 am, Steven D'Aprano st...@remove-this- cybersource.com.au wrote: On Fri, 01 May 2009 16:30:19 +1200, Lawrence D'Oliveiro wrote: I have never written anything so unbelievable in my life. And I hope I never will. I didn't say you did. If anyone thought I was quoting Lawrence's code, I'd be surprised. It was not my intention to put words into your mouth. But seeing as you have replied, perhaps you could tell us something. Given so much you despise using non-bools in truth contexts, how would you re-write my example to avoid a or b or c? for x in a or b or c: do_something_with(x) [...] I don't think it would be very common to write Steven's construction for arbitrary values of 'a', 'b', and 'c'. I don't care about arbitrary values for a, b and c. I don't expect a solution that works for (say) a=None, b=5, c=[]. I'm happy to restrict the arguments to all be arbitrary sequence-like objects. I'm even happy for somebody to give a solution with further restrictions, like if I know before hand that all three are lists, then I do blah But state your restrictions up front. If a, b, c are names or literals, then I guess you could do this: for seq in a, b, c: if seq: break for x in seq: do_something_with(x) I have never been in a situation where I needed something like this, though. -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Re: eval(WsgiApplication)
gert gert.cuyk...@gmail.com writes:
I would like to read the following from a text file
from json import loads
from gert.db import Db
def application(environ, response):
v = loads(environ['wsgi.input'].read(int(environ
['CONTENT_LENGTH'])).decode('utf-8'))
db = Db()
db.execute('UPDATE votes SET count=count+1 WHERE vid=?',(v
['vid'],))
db.execute('SELECT * FROM votes')
j = '{rec:'+db.json()+',\n'
j+= ' des:'+db.jdes()+'}'
j = j.encode('utf-8')
response('200 OK', [('Content-type', 'text/
javascript;charset=utf-8'), ('Content-Length', str(len(j)))])
return [j]
execute it, and wrap a new function name around it for example
def wrapper(environ, response):
exec(file)
return application(environ, response)
How do I do this in python3?
What's wrong with importing it?
--
Arnaud
--
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File handling problem.
Dear Group, I am using Python2.6 and has created a file where I like to write some statistical values I am generating. The statistical values are generating in a nice way, but as I am going to write it, it is not taking it, the file is opening or closing properly but the values are not getting stored. It is picking up arbitrary values from the generated set of values and storing it. Is there any solution for it? Best Regards, SBanerjee. -- http://mail.python.org/mailman/listinfo/python-list
Re: File handling problem.
subhakolkata1...@gmail.com a écrit : Dear Group, I am using Python2.6 and has created a file where I like to write some statistical values I am generating. The statistical values are generating in a nice way, but as I am going to write it, it is not taking it, the file is opening or closing properly but the values are not getting stored. It is picking up arbitrary values from the generated set of values and storing it. Is there any solution for it? Best Regards, SBanerjee. -- http://mail.python.org/mailman/listinfo/python-list Hello Could you post excerpt of your file-handling code ? It might be a buffering problem (although when the file closes, I think buffers get flushed), else it's really weird... Regards, pascal -- http://mail.python.org/mailman/listinfo/python-list
Re: eval(WsgiApplication)
gert schrieb:
I would like to read the following from a text file
Hi gert,
I'm puzzled, what is wrong with using wsgi as advertised? Just import
your code and insert it in the wsgi chain no?
cheers
Paul
from json import loads
from gert.db import Db
def application(environ, response):
v = loads(environ['wsgi.input'].read(int(environ
['CONTENT_LENGTH'])).decode('utf-8'))
db = Db()
db.execute('UPDATE votes SET count=count+1 WHERE vid=?',(v
['vid'],))
db.execute('SELECT * FROM votes')
j = '{rec:'+db.json()+',\n'
j+= ' des:'+db.jdes()+'}'
j = j.encode('utf-8')
response('200 OK', [('Content-type', 'text/
javascript;charset=utf-8'), ('Content-Length', str(len(j)))])
return [j]
execute it, and wrap a new function name around it for example
def wrapper(environ, response):
exec(file)
return application(environ, response)
How do I do this in python3?
--
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--
http://mail.python.org/mailman/listinfo/python-list
Re: eval(WsgiApplication)
On May 2, 10:25 am, Arnaud Delobelle arno...@googlemail.com wrote:
gert gert.cuyk...@gmail.com writes:
I would like to read the following from a text file
from json import loads
from gert.db import Db
def application(environ, response):
v = loads(environ['wsgi.input'].read(int(environ
['CONTENT_LENGTH'])).decode('utf-8'))
db = Db()
db.execute('UPDATE votes SET count=count+1 WHERE vid=?',(v
['vid'],))
db.execute('SELECT * FROM votes')
j = '{rec:'+db.json()+',\n'
j+= ' des:'+db.jdes()+'}'
j = j.encode('utf-8')
response('200 OK', [('Content-type', 'text/
javascript;charset=utf-8'), ('Content-Length', str(len(j)))])
return [j]
execute it, and wrap a new function name around it for example
def wrapper(environ, response):
exec(file)
return application(environ, response)
How do I do this in python3?
What's wrong with importing it?
The problem is that my wsgi files have a wsgi extention for mod_wsgi
use
package
- __init__.py
- session.py
- db.py
- sqlite
- - sql.db
- www
- - test.htm
- - test.css
- - test.js
- - test.wsgi
i would like to make this package work both in mod_wsgi and cherrypy
server
mod_wsgi has a .wsgi handler because it is recommended to rename the
wsgi file with wsgi extensions to avoid double imports
cherrypy server has a dispatcher class
--
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Re: Warning of missing side effects
Tobias Weber a écrit : Hi, being new to Python I find remarkable that I don't see any side effects. That's especially true for binding. First, it is a statement, so this won't work: if x = q.pop(): print x # output only true values Second, methods in the standard library either return a value OR modify the reciever, so even if assignment was an expression the above wouldn't work. Only it still wouldn't, because IF is a statement as well. So no ternary: x = if True: 5 else: 7; However there is one bit of magic, functions implicitly return None. So while the following will both run without error, only one actually works: x = 'foo'.upper() y = ['f', 'b'].reverse() Now I mentioned that the mutable types don't have functions that mutate and return something, so I only have to remember that... But I'm used to exploiting side effect, and sometimes forget this rule in my own classes. IS THERE A WAY to have the following produce a runtime error? def f(): x = 5 # no return y = f() Maybe use strict ;) Hello Just to note that if ['f', 'b'].reverse() doesn't return the new value, there is a corersponding function : reversed(mylist) which does it (idem, sorted(list) - list.sort()) B-) Concerning your question on warnings, well I guess that after a little time in python, you won't make mistakes on side effects anymore ; But if you want to add checks to your methods, you should see towards decorators or metaclasses : they allow you to wrap your methods inside other methods, of which the only point couldbe, for example, to check what your methods returtn and raise a warning if it returns None. But the problem is, sometimes you WANT them to return None If you want to detect methods that don't have explicit return statements, then you'll have to play with abstract syntax trees it seems... much trouble for not much gain. I guess you'll quickly get the pythonic habits without needing all that ^^ Regards, pascal -- http://mail.python.org/mailman/listinfo/python-list
Re: web access through vpn client
mark.sea...@gmail.com wrote: On May 1, 5:57 pm, Martin P. Hellwig martin.hell...@dcuktec.org wrote: mark.sea...@gmail.com wrote: Hi; I am trying to retrieve financial data off website for stock market analysis. Just hobby not for pay. I actually am impressed that urllib2 and BeautifulSoup work pretty well to do what I want, and the first little routine actually gets the data from the web page... except if my VPN client is turned on. I've looked around for a solution but can't find... perhaps I'm not entering the right search words. I don't even know where to start. Can anyone suggest some good reading, or basic idea how to approach? Thanks, Mark When the VPN client is on, can you actually still browse the 'classical' way to the website in question? I ask this because many cooperate VPN clients have a way of shutting down all other access besides to the VPN server (which is very annoying but I can see the logic behind it). If that is the case your VPN network might have a webproxy which needs to be configured to continue browsing when connected to the VPN. For python you can automate this by checking for access to the proxy and use it if it is there. -- MPHhttp://blog.dcuktec.com Yes when Cisco AnyConnect VPN client is connected, I can browse w/ IE. I think the packets get encrypted and possibly go to my company's server and out from there, because then also Outlook connects to my company, Communicator works, etc. With VPN off I can browse and Python can get URL, but no connection through my company's server no encryption. Where can I find out more about how to configure the webproxy, if the info is handy? Thanks! Mark Most likely your IE gets automatically configured for using a proxy when the VPN is made, just check your IE settings ounce you are connected to the VPN particular the Connection / LAN-connection settings. Or query what is set in the registry at : 'HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings' And use the content (if set) as the proxy address in the urllib module. You might find this module useful for that: http://docs.python.org/library/_winreg.html -- MPH http://blog.dcuktec.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Warning of missing side effects
But I'm used to exploiting side effect, and sometimes forget this rule in my own classes. IS THERE A WAY to have the following produce a runtime error? def f(): x = 5 # no return y = f() Typically, this will produce a runtime error fairly quickly, namely when you *use* the (presumed) return value of f(). You would normally try to perform some computation with y, or invoke methods on it - and then you see that it is None. So while it is not possible to get an exception on the assignment, you will usually get a runtime error sooner or later (most of the time, sooner). FWIW, pylint -e reports on your code E: 5: Assigning to function call which doesn't return Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiprocessing.Queue - I want to end.
: Roel Schroeven rschroev_nospam...@fastmail.fm wrote: Hendrik van Rooyen schreef: I have always wondered why people do the one queue many getters thing. Because IMO it's the simplest and most elegant solution. That is fair enough... Given that the stuff you pass is homogenous in that it will require a similar amount of effort to process, is there not a case to be made to have as many queues as consumers, and to round robin the work? Could work if the processing time for each work unit is exactly the same (otherwise one or more consumers will be idle part of the time), but in most cases that is not guaranteed. A simple example is fetching data over the network: even if the data size is always the same, there will be differences because of network load variations. If you use one queue, each consumer fetches a new work unit as soon it has consumed the previous one. All consumers will be working as long as there is work to do, without having to write any code to do the load balancing. With one queue for each consumer, you either have to assume that the average processing time is the same (otherwise some consumers will be idle at the end, while others are still busy processing work units), or you need some clever code in the producer(s) or the driving code to balance the loads. That's extra complexity for little or no benefit. I like the simplicity of having one queue: the producer(s) put work units on the queue with no concern which consumer will process them or how many consumers there even are; likewise the consumer(s) don't know and don't need to know where their work units come from. And the work gets automatically distributed to whichever consumer has first finished its previous work unit. This is all true in the case of a job that starts, runs and finishes. I am not so sure it applies to something that has a long life. And if the stuff you pass around needs disparate effort to consume, it seems to me that you can more easily balance the load by having specialised consumers, instead of instances of one humungous I can eat anything consumer. If there is a semantic difference, maybe yes; but I think it makes no sense to differentiate purely on the expected execution times. The idea is basically that you have the code that classifies in one place only, instead of running in all the instances of the consumer. Feels better to me, somehow. I also think that having a queue per consumer thread makes it easier to replace the threads with processes and the queues with pipes or sockets if you need to do serious scaling later. Perhaps, but isn't that a case of YAGNI and/or premature optimization? Yes and no: Yes - You Are Gonna Need It. and No it is never premature to use a decent structure. :-) - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
Re: Question about the wording in the python documents.
Steven D'Aprano I don't understand your objection. Is it that the documentation calls it Request instead of urllib2.Request? Or that it calls it an object instead of an instance? I guess the latter ... In either case, I think you're picking a nit so small that it isn't actually there. All objects are instances (in Python), and all instances are objects. Exactly, so strictly seen, Request object could possibly refer to the urllib2.Request class itself. I guess, the OP would prefer the term Request instance, emphasizing, that an instance of the request class has to be passed, not he class itself. -- Freedom is always the freedom of dissenters. (Rosa Luxemburg) -- http://mail.python.org/mailman/listinfo/python-list
Re: Question about the wording in the python documents.
In message cb978535-4092-49ac-8d9f- a457d5fd6...@k19g2000prh.googlegroups.com, grocery_stocker wrote: req is clearly an instance of urllib2.Request and not a Request object. Object is a term commonly used to mean instance of a class. In Python, classes are also objects, but if classes were meant rather than instances, I imagine it would say so. -- http://mail.python.org/mailman/listinfo/python-list
Re: stuck with PyOBEX
I am having problems with connect() it says that it doesn't have sendall atribute. Error: Traceback (most recent call last): File novi_pokusaj.py, line 25, in module client.connect() File C:\Python25\lib\PyOBEX\client.py, line 356, in connect return Client.connect(self, header_list = [headers.Target(uuid)]) File C:\Python25\lib\PyOBEX\client.py, line 127, in connect response = self._send_headers(request, header_list, max_length) File C:\Python25\lib\PyOBEX\client.py, line 81, in _send_headers self.socket.sendall(request.encode()) AttributeError: BluetoothSocket instance has no attribute 'sendall' Exit Code: 1 Did you manage to run it under windows? -- http://mail.python.org/mailman/listinfo/python-list
Re: File handling problem.
On Sat, 02 May 2009 01:26:14 -0700, subhakolkata1234 wrote: Dear Group, I am using Python2.6 and has created a file where I like to write some statistical values I am generating. The statistical values are generating in a nice way, but as I am going to write it, it is not taking it, the file is opening or closing properly but the values are not getting stored. It is picking up arbitrary values from the generated set of values and storing it. Is there any solution for it? Yes. Find the bug in your program and fix it. If you'd like some help finding the bug, you'll need to give us a little bit more information. This website might help you: http://www.catb.org/~esr/faqs/smart-questions.html -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: object query assigned variable name?
On Fri, May 1, 2009 at 12:48 PM, Steven D'Aprano st...@remove-this-cybersource.com.au wrote: On Fri, 01 May 2009 09:24:10 -0700, warpcat wrote: I'd like it to print, when instanced, something like this: s = Spam() I’m assigned to s! But it seems prohibitively hard (based on my web and forum searches) for an object to know what variable name is has been assigned to when created. Can't be done. Objects don't know what names they are bound to. While objects don't know what they are assigned to, they can be made to find out. Unless you have a good use case I don't think that you really want to be doing it. DecoratorTools allows you to do this. I have code that allows you to use a a function like: class C: attr = inject(Customer) The inject function does know that it is being assigned to attr. There is tracing/frame introspection black magic involved. So much so that I have been debating removing that feature. The code is on Bitbucket[1]. It has a little extra complication because inject can also be used as a decorator. The key is the decorate_assignment call in the inject function. Again I don't think you really want to do this. [1] http://bitbucket.org/dstanek/snake-guice/src/tip/snakeguice/decorators.py -- David blog: http://www.traceback.org twitter: http://twitter.com/dstanek -- http://mail.python.org/mailman/listinfo/python-list
Re: Warning of missing side effects
Tobias Weber wrote: Hi, being new to Python I find remarkable that I don't see any side effects. That's especially true for binding. First, it is a statement, so this won't work: if x = q.pop(): print x # output only true values Second, methods in the standard library either return a value OR modify the reciever, so even if assignment was an expression the above wouldn't work. Only it still wouldn't, because IF is a statement as well. So no ternary: x = if True: 5 else: 7; However there is one bit of magic, functions implicitly return None. So while the following will both run without error, only one actually works: x = 'foo'.upper() y = ['f', 'b'].reverse() Now I mentioned that the mutable types don't have functions that mutate and return something, so I only have to remember that... But I'm used to exploiting side effect, and sometimes forget this rule in my own classes. IS THERE A WAY to have the following produce a runtime error? def f(): x = 5 # no return y = f() Maybe use strict ;) There's a ternary operator. Check out the following sequence: a = 42 b = 12 if a == 42 else 9 print a, b Then try it again with a different value of a. As for using = in an ordinary expression, I don't really miss it. Python allows multiple assignments in the same statement, but they're all to the same object. For the kinds of things where I would have done an assignment inside an if or while (in C++), I usually can use a list comprehension or somesuch. -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with money datatype based calculations in python
Krishnakant krm...@gmail.com wrote: ['money datatype' for database stored values] What ist the real problem? Do you have problems converting results of float calculations to the 'money datatype' before storing them in the database, or do you want to avoid the precision issues which come with the conversion od non-integer values between binary and decimal? In the latter case use the Decimal data type from module decimal (comes with the python distribution -- it is mentioned in the tutorial). Regards, Günther -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with money datatype based calculations in python
Do calculations in postgresql and then call that calculated value from the python.So no need to calculate in python at all Njoy the share of Freedom, Anusha Kadambala On Sat, May 2, 2009 at 1:15 PM, Krishnakant krm...@gmail.com wrote: hello all, I am using postgresql as a database server for my db application. The database is related to accounts and point of sales and many calculations involve money datatype. The application logic is totally done in python. Now the problem is that there is a situation where we calculate tax on % of the total amount on the invoice. The percentage is in terms of float but the eventual amount has to be in a money datatype. The product cost comes in money datatype from postgresql and the tax % comes in float. So I would like to know if python supports some thing similar to money datatype so that I can cast my total amount (in money ) divided by tax% (in float ) so money divided by float should be the result and that result should be in money datatype. For example a product x has the cost Rs. 100 which is stored in the tabel as money type. and in the tax table for that product the VAT is 5% and this 5% is stored in float datatype. So after using both these values the resulting total 105Rs. should be in money type and not float. I awaite some reply, Thanks in advice. happy hacking. Krishnakant. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Warning of missing side effects
Dave Angel da...@ieee.org writes: Python allows multiple assignments in the same statement, but they're all to the same object. Unless they are to different objects: a, b = 1, 2 -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with money datatype based calculations in python
Krishnakant wrote: hello all, I am using postgresql as a database server for my db application. The database is related to accounts and point of sales and many calculations involve money datatype. The application logic is totally done in python. Now the problem is that there is a situation where we calculate tax on % of the total amount on the invoice. The percentage is in terms of float but the eventual amount has to be in a money datatype. The product cost comes in money datatype from postgresql and the tax % comes in float. So I would like to know if python supports some thing similar to money datatype so that I can cast my total amount (in money ) divided by tax% (in float ) so money divided by float should be the result and that result should be in money datatype. For example a product x has the cost Rs. 100 which is stored in the tabel as money type. and in the tax table for that product the VAT is 5% and this 5% is stored in float datatype. So after using both these values the resulting total 105Rs. should be in money type and not float. I awaite some reply, Thanks in advice. happy hacking. Krishnakant. Tax rate isn't divided, it's multiplied. But probably that's just a typo in your message. Short answer is use your money class to convert the float into money. And then test, to see that's really what you wanted. Be sure and check the edge cases, because float is a binary system, and you can get both quantization and rounding problems converting between them. Is the money you're dealing with decimal-based? So maybe money values are integers plus two more digits of fractional precision? It's going to be tough for somebody with no access to that money type to guess what your problem is. What operations does it currently support? If it supports multiply, then just change the tax rate to be a money type. Unless of course you might have a tax rate of 5.221% Does your money class support accurate conversion to class decimal? In that case, convert to decimal, multiply, then convert back. Or if money is really a fixed-point class, with assumed two digits, multiply the cost by 100 and convert to int. Multiply by the tax, and convert back. You also need to specify the government rules for the multiply. Is rounding permitted, or must all fractions of a penny (assumption there) be rounded up? Or switch everything to class decimal in the standard python library, You still have most of the questions to answer, but at least you'd be asking on the right forum. -- http://mail.python.org/mailman/listinfo/python-list
Re: debian apt somehow created python hell! - help
Hi, Try this. # aptitude update # aptitude update # aptitude upgrade you can also use # aptitude safe-upgrade Hope it helps. Paulo Repreza On May 1, 2009 7:20 PM, watermod dayscon...@ameritech.net wrote: I was doing one of those auto apt-get gui things with update manager in Debian and not watching the error log so I don't know where it started. It involves only Python stuff. I don't know Python but apps use it. The current apt state is that python apps are failing install in: /usr/sbin/update-python-modules typical error list looks like: dpkg: warning - old pre-removal script returned error exit status 1 dpkg - trying script from the new package instead ... WARNING: python-gtk2-doc.private does not exist. Some bytecompiled files may be left behind. Traceback (most recent call last): File /usr/sbin/update-python-modules, line 437, in module public_packages[package].install(need_postinstall) File /usr/sbin/update-python-modules, line 232, in __getitem__ self[name] = SharedFileList (path) File /usr/sbin/update-python-modules, line 146, in __init__ for line in file(path): IOError: [Errno 21] Is a directory dpkg: error processing /var/cache/apt/archives/python-gtk2- doc_2.14.1-2_all.deb (--unpack): subprocess new pre-removal script returned error exit status 1 Traceback (most recent call last): File /usr/sbin/update-python-modules, line 437, in module public_packages[package].install(need_postinstall) File /usr/sbin/update-python-modules, line 232, in __getitem__ self[name] = SharedFileList (path) File /usr/sbin/update-python-modules, line 146, in __init__ for line in file(path): IOError: [Errno 21] Is a directory dpkg: error while cleaning up: on and on and on The following: dpkg -C gives: The following packages are in a mess due to serious problems during installation. They must be reinstalled for them (and any packages that depend on them) to function properly: python-reportbug Python modules for interacting with bug tracking systems lsb-release Linux Standard Base version reporting utility python-ogg Python interface to the Ogg library system-config-lvmA utility for graphically configuring Logical Volumes bitpim utility to communicate with many CDMA phones bitpim-lib architecture-dependent helper files for BitPim python-glade2GTK+ bindings: Glade support python-gtk2 Python bindings for the GTK+ widget set python-feedparserUniversal Feed Parser for Python python-gtk2-doc Python bindings for the GTK+ widget set - documentation k3d 3D modeling and animation system The following packages have been unpacked but not yet configured. They must be configured using dpkg --configure or the configure menu option in dselect for them to work: acroread-plugins Plugins for Adobe Acrobat(R) Reader python-roman module for generating/analyzing Roman numerals python-soappySOAP Support for Python python-glpk Python bindings to the GNU Linear Programming Kit python-dialogPython module for making simple Text/Console-mode user in python-biggles Scientific plotting package for Python python-gdPython module wrapper for libgd python-clutter Open GL based interactive canvas library - Python binding python-decoratortools version-agnostic decorators support for Python python-fpconst Utilities for handling IEEE 754 floating point special va acroread-datadata files for acroread python-galago-gtkGTK+ widgets for the Galago presence library (Python inte python-utmp python module for working with utmp python-debianbts Python interface to Debian's Bug Tracking System python-gobject-dev Development headers for the GObject Python bindings acroread-escript Adobe EScript Plug-In python-dhm collection of Python utilities / helper python-unit unit test framework for Python acpidUtilities for using ACPI power management python-sqlalchemySQL toolkit and Object Relational Mapper for Python python-gnutlsPython wrapper for the GNUTLS library python-xlib Interface for Python to the X11 Protocol acroread Adobe Acrobat Reader: Portable Document Format file viewe python-pyinotify simple Linux inotify Python bindings python-facebook Python wrappers for the Facebook API reportbugreports bugs in the Debian distribution python-ll-core Python modules for colors, make, cron, daemons, URLs, tem python-beakerSimple WSGI middleware that uses the Myghty Container API python-xcbgenX C Binding - protocol binding generator libroot-dev Header files for ROOT python-dcop DCOP bindings for Python python-docutils utilities for the documentation of Python modules libroot-python-dev Python extension for ROOT - development files python-extractor
Re: stuck with PyOBEX
On Saturday 02 May 2009 14:25, alejandro wrote: I am having problems with connect() it says that it doesn't have sendall atribute. Error: Traceback (most recent call last): File novi_pokusaj.py, line 25, in module client.connect() File C:\Python25\lib\PyOBEX\client.py, line 356, in connect return Client.connect(self, header_list = [headers.Target(uuid)]) File C:\Python25\lib\PyOBEX\client.py, line 127, in connect response = self._send_headers(request, header_list, max_length) File C:\Python25\lib\PyOBEX\client.py, line 81, in _send_headers self.socket.sendall(request.encode()) AttributeError: BluetoothSocket instance has no attribute 'sendall' Exit Code: 1 Did you manage to run it under windows? I haven't tried to run it under Windows. I just assumed that BluetoothSocket would have the same API on both Linux and Windows. Looking around, it seems that this is something we can work around: http://svn.navi.cx/misc/trunk/laserprop/client/BluetoothConduit.py I'll send you an updated version to try if you would like to test it. David -- http://mail.python.org/mailman/listinfo/python-list
for with decimal values?
Hello all, Is there a Python construct to allow me to do something like this: for i in range(-10.5, 10.5, 0.1): ... If there is such a thing already available, I'd like to use it, otherwise I can write a function to mimic this, but I thought I'd check (my search yielded nothing). Thanks, Esmail -- http://mail.python.org/mailman/listinfo/python-list
Re: Profiling gives very different predictions of best algorithm
On May 1, 7:38 pm, Terry Reedy tjre...@udel.edu wrote: I presume in your overall time text, you ran the two versions of the algorith 'naked'. But, for some reason, you are profiling them embedded inside a test suite and runner. It does not seem that this should affect relative timing, but I have seen some pretty strange behaviors. At best, it will add noise. Let me expand my question: what did you do differently between the two profile runs? When I compute the electron repulsion integrals, the two different methods are: if packed: ijkl = intindex(i,j,k,l) Ints[ijkl] = coulomb(bfs[i],bfs[j],bfs [k],bfs[l]) else: val = coulomb(bfs[i],bfs[j],bfs[k],bfs[l]) Ints[i,j,k,l] = val Ints[j,i,k,l] = val Ints[i,j,l,k] = val Ints[j,i,l,k] = val Ints[k,l,i,j] = val Ints[k,l,j,i] = val Ints[l,k,i,j] = val Ints[l,k,j,i] = val and when I access the integrals the differences are: if packed: index = intindex(i,j,k,l) temp[kl] = Ints[index] else: temp[kl] = Ints[i,j,k,l] If you look at the profiling, I'm making something like 11M calls to intindex, which is a routine I've written in C. I thought that by storing all N**4 integrals (rather than the N**4/8 that packed stores) would remove the need for the intindex calls and speed things up, but it's 50% slower. I can't really figure out why it's slower, though, since profiling makes it look like the slower version is faster. Something like 30% of the time for the full PyQuante test suite is taken up with calls to intindex, and I'd like to remove this if possible. I also wrote a version of the code where I stored all of the intindex values in a Python dictionary rather than calling a C function. That version appeared to be roughly the same speed when I profiled the code, although I didn't test it without profiling (stupidly) because at that point I didn't recognize the magnitude of the discrepancy between the profiling/nonprofiling timings. I was posting to the list mostly because I would like to know whether I can do something different when I profile my code so that it give results that correspond more closely to those that the nonprofiling results give. -- http://mail.python.org/mailman/listinfo/python-list
Re: for with decimal values?
In article mailman.4975.1241277173.11746.python-l...@python.org, Esmail ebo...@hotmail.com wrote: Is there a Python construct to allow me to do something like this: for i in range(-10.5, 10.5, 0.1): ... If there is such a thing already available, I'd like to use it, otherwise I can write a function to mimic this, but I thought I'd check (my search yielded nothing). Write a function -- Aahz (a...@pythoncraft.com) * http://www.pythoncraft.com/ Typing is cheap. Thinking is expensive. --Roy Smith -- http://mail.python.org/mailman/listinfo/python-list
Re: Warning of missing side effects
Arnaud Delobelle wrote: Dave Angel da...@ieee.org writes: Python allows multiple assignments in the same statement, but they're all to the same object. Unless they are to different objects: a, b = 1, 2 You're right, of course. I was referring to the multiple '=' form, and my statement was too general to be correct. a = b = 42 is legal a = (b=42) + 1 is not -- http://mail.python.org/mailman/listinfo/python-list
Re: Question about the wording in the python documents.
On May 2, 4:14 am, Sebastian Wiesner basti.wies...@gmx.net wrote: Steven D'Aprano I don't understand your objection. Is it that the documentation calls it Request instead of urllib2.Request? Or that it calls it an object instead of an instance? I guess the latter ... In either case, I think you're picking a nit so small that it isn't actually there. All objects are instances (in Python), and all instances are objects. Exactly, so strictly seen, Request object could possibly refer to the urllib2.Request class itself. I guess, the OP would prefer the term Request instance, emphasizing, that an instance of the request class has to be passed, not he class itself. Yes, I personally think that the term Request instance would have made it much clearer to us people that have never taken a computer science class in our lives. -- http://mail.python.org/mailman/listinfo/python-list
Re: for with decimal values?
Aahz a écrit : In article mailman.4975.1241277173.11746.python-l...@python.org, Esmail ebo...@hotmail.com wrote: Is there a Python construct to allow me to do something like this: for i in range(-10.5, 10.5, 0.1): ... If there is such a thing already available, I'd like to use it, otherwise I can write a function to mimic this, but I thought I'd check (my search yielded nothing). Write a function Else you can work on integers - for i in range (-105, 105) - and divide by ten just below... but concerning performances I don't know if it's a good idea ^^ Regards, Pascal -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with money datatype based calculations in python
On Sat, 02 May 2009 15:43:23 +0200 Günther Dietrich guenther.dietr...@spamfence.net wrote: Krishnakant krm...@gmail.com wrote: ['money datatype' for database stored values] What ist the real problem? Do you have problems converting results of float calculations to the 'money datatype' before storing them in the database, or do you want to avoid the precision issues which come with the conversion od non-integer values between binary and decimal? In the latter case use the Decimal data type from module decimal (comes with the python distribution -- it is mentioned in the tutorial). And if you use PyGreSQL (http://www.PyGreSQL.org/) to connect to the database then the money type is already converted to Decimal. -- D'Arcy J.M. Cain da...@druid.net | Democracy is three wolves http://www.druid.net/darcy/| and a sheep voting on +1 416 425 1212 (DoD#0082)(eNTP) | what's for dinner. -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with money datatype based calculations in python
On Sat, 02 May 2009 13:15:22 +0530, Krishnakant krm...@gmail.com wrote: hello all, I am using postgresql as a database server for my db application. The database is related to accounts and point of sales and many calculations involve money datatype. [snip] As far as I can tell, Python has no type money. Is money a class defined by some postgresql module you're using? A very small amount of specific information (e.g., a five-line sample program that demonstrates the problem) would greatly improve your chances of getting useful help. -- To email me, substitute nowhere-spamcop, invalid-net. -- http://mail.python.org/mailman/listinfo/python-list
Accessing files in a directory which is a shortcut link (Windows)
Hi, I'd like to process files in a directory which is in fact a short cut link to another directory (under windows XP). If the path to the directory is for instance called c:\test. I have tried both following code snipets for printing all names of files in the directory: ++ snippet 1++ for filename in glob.glob( os.path.join(r'c:\test', '*') ): print filename ++ snippet 2++ for filename in glob.glob( os.path.join(r'c:\test.lnk', '*') ): print filename Neither solution works. Thanks very much for any help. -- http://mail.python.org/mailman/listinfo/python-list
Re: Daemonic processes in multiprocessing - solved
Pascal Chambon a écrit : Hello everyone I've just read the doc of the (awesome) multiprocessing module, and there are some little things I don't understand, concerning daemon processes (see quotes below). When a python process exits, the page says it attempts to join all its children. Is this just a design choice, or are there constraints behind this ? Because normally, when a parent process exits, its child gets adopted by init, and that can be useful for creating daemons, can't it ? Concerning daemons processes, precisely, the manual states that they are all terminated when their parent process exits. But isn't it contrary to the concept of dameons, which are supposed to have become independent from their parent ? And I don't understand how the initial value (of the daemonic attribute) is inherited from the creating process, since daemonic processes are not allowed to create child processes. Isn't it the same to say that daemonic is always false by default, then ? And finally, why can't daemonic processes have children ? If these children get orphaned when the daemonic process gets terminated (by its parent), they'll simply get adpoted by init, won't they ? Thanks a lot for helping me get rid of my confusion, regards, Pascal =QUOTES== daemon¶ http://docs.python.org/library/multiprocessing.html#multiprocessing.Process.daemon The process's daemon flag, a Boolean value. This must be set before start() http://docs.python.org/library/multiprocessing.html#multiprocessing.Process.start is called. The initial value is inherited from the creating process. When a process exits, it attempts to terminate all of its daemonic child processes. Note that a daemonic process is not allowed to create child processes. Otherwise a daemonic process would leave its children orphaned if it gets terminated when its parent process exits. -- Similarly, if the child process is non-daemonic then the parent process may hang on exit when it tries to join all its non-daemonic children. -- Remember also that non-daemonic processes will be automatically be joined. -- http://mail.python.org/mailman/listinfo/python-list Allright, I guess I hadn't understand much about daemonic processes in python's multiprocessing module. So, for those interested, here is a clarification of the concepts, as far as I've understood - please poke me if I'm wrong somewhere. Usually, in Unix, daemon processes are processes which got disconnected from their parent process and from terminals, and work in the background, often under a different user identity. The python multiprocessing module has the concept of daemon too, but this time in reference to the threading module, in which dameons are just threads that wont prevent the application termination, even if they are still running. Thus, daemonic processes launched through multiprocessing API are normal processes that will be terminated (and not joined) if non-dameonic processes are all over. Thus, not much in common between traditionnal *nix daemon processes, and python multiprocessing daemon processes. Regards, pascal -- http://mail.python.org/mailman/listinfo/python-list
Re: Accessing files in a directory which is a shortcut link (Windows)
jorma kala wrote: Hi, I'd like to process files in a directory which is in fact a short cut link to another directory (under windows XP). If the path to the directory is for instance called c:\test. I have tried both following code snipets for printing all names of files in the directory: ++ snippet 1++ for filename in glob.glob( os.path.join(r'c:\test', '*') ): print filename ++ snippet 2++ for filename in glob.glob( os.path.join(r'c:\test.lnk', '*') ): print filename Windows shortcuts are Shell (ie GUI Desktop) objects rather than filesystem objects. The filesystem doesn't treat them specially; just returns the .lnk file (or whatever it's called). You need to invoke the Shell functionality specifically. code import os, sys import glob import pythoncom from win32com.shell import shell, shellcon def shortcut_target (filename): shell_link = pythoncom.CoCreateInstance ( shell.CLSID_ShellLink, None, pythoncom.CLSCTX_INPROC_SERVER, shell.IID_IShellLink ) ipersist = shell_link.QueryInterface (pythoncom.IID_IPersistFile) ipersist.Load (filename) name, _ = shell_link.GetPath (1) return name def shell_glob (pattern): for filename in glob.glob (pattern): if filename.endswith (.lnk): yield %s = %s % (filename, shortcut_target (filename)) else: yield filename for filename in shell_glob (c:/temp/*): print filename /code TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: for with decimal values?
Esmail ebo...@hotmail.com writes: Hello all, Is there a Python construct to allow me to do something like this: for i in range(-10.5, 10.5, 0.1): ... If there is such a thing already available, I'd like to use it, otherwise I can write a function to mimic this, but I thought I'd check (my search yielded nothing). Thanks, Esmail In this particular example, you could do this: for i in range(-105, 105): i = 0.1*i ... In general, you'd have to write your own (generator) function. -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Re: Accessing files in a directory which is a shortcut link (Windows)
Tim Golden wrote: Windows shortcuts are Shell (ie GUI Desktop) objects rather than filesystem objects. The filesystem doesn't treat them specially; just returns the .lnk file (or whatever it's called). As a caveat: they don't actually *have* to be called .lnk (altho' they almost universally are). That said, I don't know any straightforward way of otherwise distinguishing shortcut from non-shortcut files. I think you'd just have to call .Load on the IPersist instance and catch the E_FAIL exception. TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: for with decimal values?
On May 2, 4:12 pm, Esmail ebo...@hotmail.com wrote: Is there a Python construct to allow me to do something like this: for i in range(-10.5, 10.5, 0.1): ... I'd recommend using integer arithmetic: for ten_times_i in range(-105, 106): i = ten_times_i / 10.0 ... This has the advantage that it's clear that you want to include the endpoint 10.5. (*Did* you want to include the endpoint?) Presumably you'd want the float version to be interpreted as: i = -10.5 while i 10.5: ... i += 0.1 (which isn't *quite* right, because the value of i that you end up with *after* the while loop has run to completion is 0.1 more than the last value used within the loop). The big problem with this is that 0.1 is not exactly representable as a float, and so the successive additions in the assignment i += 0.1 are subject to (small) rounding errors. As a result, it's not clear whether the value of i for the last loop is going to be 10.4+small_error or 10.5-small_error. Mark -- http://mail.python.org/mailman/listinfo/python-list
Re: for with decimal values?
Thanks all, I appreciate the various suggestions and caveats. Just wanted to make sure I'm not re-inventing the wheel as Python seems to have already so much. Cheers, Esmail -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there any way this queue read can possibly block?
That wasn't the problem. An incoherent bug report from a user was the problem. John Nagle Carl Banks wrote: On Apr 30, 11:48 am, John Nagle na...@animats.com wrote: def draininput(self) : # consume any queued input try: while True : ch = self.inqueue.get_nowait() # get input, if any except Queue.Empty:# if empty return # done self.inqueue is a Queue object. The intent here is to drain the queue, then return. Is there any way this can possibly block or hang? Yes, but it'll be waiting to acquire the semaphore which Queues normally don't hold onto for long. Carl Banks I wouldn't think so. Another thread is doing put operations, but slowly, never more than 5 per second. (It's working for me, but a user of a program of mine is having a problem.) John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Question about the wording in the python documents.
grocery_stocker – Samstag, 2. Mai 2009 17:30 On May 2, 4:14 am, Sebastian Wiesner basti.wies...@gmx.net wrote: Steven D'Aprano In either case, I think you're picking a nit so small that it isn't actually there. All objects are instances (in Python), and all instances are objects. Exactly, so strictly seen, Request object could possibly refer to the urllib2.Request class itself. I guess, the OP would prefer the term Request instance, emphasizing, that an instance of the request class has to be passed, not he class itself. Yes, I personally think that the term Request instance would have made it much clearer to us people that have never taken a computer science class in our lives. Btw, I should have said, that I don't share your objection: Imho you don't need computer science lessons, but only common sense to understand, that passing the class object itself doesn't really make sense in this context ;) -- Freedom is always the freedom of dissenters. (Rosa Luxemburg) -- http://mail.python.org/mailman/listinfo/python-list
Convert variable directly into a string (no ASCII)
Hello, I need to print variables out over serial, however I need them to not be in ASCII, ie if the variable is 5 then print 5 not 5. The function that writes to the serial port requires a string and I can send non-variables out with the string /x05 for 5. Is this even possible? Thanks, Justin -- http://mail.python.org/mailman/listinfo/python-list
Re: for with decimal values?
Esmail: Is there a Python construct to allow me to do something like this: for i in range(-10.5, 10.5, 0.1): Sometimes I use an improved version of this: http://code.activestate.com/recipes/66472/ Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: for with decimal values?
bearophileh...@lycos.com wrote: Esmail: Is there a Python construct to allow me to do something like this: for i in range(-10.5, 10.5, 0.1): Sometimes I use an improved version of this: http://code.activestate.com/recipes/66472/ neat .. lots of code to study there. Thanks, Esmail -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiprocessing.Queue - I want to end.
Hendrik van Rooyen schreef: : Roel Schroeven rschroev_nospam...@fastmail.fm wrote: ... This is all true in the case of a job that starts, runs and finishes. I am not so sure it applies to something that has a long life. It's true that I'm talking about work units with relatively short lifetimes, mostly a few seconds but perhaps maximum about ten minutes. I assumed that queues are mostly used for that kind of stuff. I've never really thought about cases where that assumption doesn't hold, so it's very well possible that all I've said is invalid in other cases. And if the stuff you pass around needs disparate effort to consume, it seems to me that you can more easily balance the load by having specialised consumers, instead of instances of one humungous I can eat anything consumer. If there is a semantic difference, maybe yes; but I think it makes no sense to differentiate purely on the expected execution times. The idea is basically that you have the code that classifies in one place only, instead of running in all the instances of the consumer. Feels better to me, somehow. I most cases that I can imagine (and certainly in all cases I've used), no classification whatsoever is even needed. -- The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom. -- Isaac Asimov Roel Schroeven -- http://mail.python.org/mailman/listinfo/python-list
Re: Convert variable directly into a string (no ASCII)
I need to print variables out over serial, however I need them to not be in ASCII, ie if the variable is 5 then print 5 not 5. The function that writes to the serial port requires a string and I can send non-variables out with the string /x05 for 5. Is this even possible? Check out the struct module. a = 5 struct.pack(b, a) '\x05' --S -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with money datatype based calculations in python
On Sat, 2009-05-02 at 11:57 -0400, D'Arcy J.M. Cain wrote: And if you use PyGreSQL (http://www.PyGreSQL.org/) to connect to the database then the money type is already converted to Decimal. d'arcy, I visited the home page for pygresql and discovered that you wrote the library. I am happy that you also included a non-dbapi (postgresql classic interface ) along with the standard DBAPI module. I would like to know if it has been tested with postgresql 8.3 and are there any known bottlenecks while using this driver module on large scale database opperations? Is this actively maintained? Perhaps this might be off topic but may I ask, how is pypgsql, Has any one used pgsql for any postgresql based software? and between pygresql and pypgsql which one is more maintained? the system I am developing is a mission critical financial application and I must be pritty sure about any module I am using. happy hacking. Krishnakant. -- http://mail.python.org/mailman/listinfo/python-list
Re: Convert variable directly into a string (no ASCII)
I need to print variables out over serial, however I need them to not be in ASCII, ie if the variable is 5 then print 5 not 5. The function that writes to the serial port requires a string and I can send non-variables out with the string /x05 for 5. Is this even possible? So you have a number N given, between 0 and 255, and you want to send the byte whose ordinal is N. Right? Send chr(N). HTH, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Convert variable directly into a string (no ASCII)
Justin Rajewski wrote: I need to print variables out over serial, however I need them to not be in ASCII, ie if the variable is 5 then print 5 not 5. The function that writes to the serial port requires a string and I can send non-variables out with the string /x05 for 5. Take a look at the chr() function. For completeness, the complementary one is ord(). However, also take a look at the 'struct' module, which is the tool of choice if you want to do other formatting operations. I seem to remember there was a third tool that can be used for similar tasks, but I forgot which it was... Uli -- http://mail.python.org/mailman/listinfo/python-list
Re: Convert variable directly into a string (no ASCII)
Justin Rajewski jus...@embeddedmicro.com wrote:
I need to print variables out over serial, however I need them to not be
in ASCII, ie if the variable is 5 then print 5 not 5.
The function that writes to the serial port requires a string and I can
send non-variables out with the string /x05 for 5.
See module struct:
struct.pack('b', 5)
'\x05'
struct.pack('', 5, 150, 3, 224)
'\x05\x96\x03\xe0'
Regards,
Günther
--
http://mail.python.org/mailman/listinfo/python-list
writing consecutive data to subprocess command 'more'
I have this method that prints a given text via a subprocess command 'more' . It is like this: def print_by_page(text): if hasattr(sys.stdout, 'isatty') and sys.stdout.isatty(): viewer = 'more -EMR' proc = subprocess.Popen([viewer], shell=True, stdin=subprocess.PIPE, stderr=subprocess.PIPE) try: stdout, stderr = proc.communicate(text) except OSError: pass else: if stderr: # probably no 'more' available on this system sys.stdout.write(text) return sys.stdout.write(text) It works fine, but what I really want to do is first print a header through the 'more' command, then fetch some data from the web, and show it through the same 'more' command/process. And even more data, another header, other data from the web, all through the same 'more' command/process. Can somebody help me out on this? Regards, Sander Smits -- http://mail.python.org/mailman/listinfo/python-list
Re: Convert variable directly into a string (no ASCII)
Justin Rajewski jus...@embeddedmicro.com wrote: I need to print variables out over serial, however I need them to not be in ASCII, ie if the variable is 5 then print 5 not 5. The function that writes to the serial port requires a string and I can send non-variables out with the string /x05 for 5. Is this even possible? Of course. The struct and array modules can help you with this. Note that you have to know how big each variable should be. For example, if you want to sent 1, 2, and 3 out as bytes, you can do: a = 1 b = 2 c = 3 serial = struct.pack( 'BBB', a, b, c ) If you need them as 16-bit ints, you can use H instead of B. -- Tim Roberts, t...@probo.com Providenza Boekelheide, Inc. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to measure the memory cost in Python?
PS) The asizeof(obj) function from this recipe http:// code.activestate.com/recipes/546530 does size the object plus its references, recursively. Correction, the last sentence should be: The asizeof(obj) ... plus its referents, recursively. I will admit, I have *no idea* what that code is doing, but in looking through the gc module documentation, I'm seeing the gc.get_objects function. Would it be equivalent to what the OP is asking to track the size of every element returned by that? -- http://mail.python.org/mailman/listinfo/python-list
Re: Help! Can't get program to run.
On May 1, 6:10 pm, Ned Deily n...@acm.org wrote: In article 7618rjf1a3t8...@mid.uni-berlin.de, Diez B. Roggisch de...@nospam.web.de wrote: seanm...@gmail.com schrieb: I think this is maybe the most basic problem possible, but I can't get even the most basic Python to run on OS X using Terminal or IDLE. I used the IDLE editor to create a file with one line of code print 'text string' and I saved the file as module1.py. When using terminal I entered python to load the interpreter or whatever and then tried python module1.py but I got an error message. I've tried using the file path instead of module1.py and that didn't work either. I've tried moving the file to different places, my desktop, hard drive, etc., and none of that worked either. In IDLE I tried similar things and only got error messages there too. Needless to say this is a frustrating start to learning this langauge. I'd really appreciate any help getting this to work, so I can move on the actual language. Thanks so much. It would have helped if you had given us the *actual* error-message. From what little information you give, it appears as if you do something very basic wrong - instead of doing $ python python mymodule.py (where $ is the shell/terminal and the python-prompt) you either do $ python print hello or $ python mymodule.py to execute mymodule directly. And from within OS X IDLE itself, if you create or open the file mymodule.py, it will be in a separate window and, as long as that window is selected, you can run the file directly within IDLE by selecting Run Module from the Run menu. So, no need to use the Terminal if you don't want to. -- Ned Deily, n...@acm.org Thank you for both for the help. I still cannot get the program to run though. Below I've copied my commands and the error messages for you (in IDLE then Terminal): IDLE 2.6.2 python module1.py SyntaxError: invalid syntax and sean-marimpietris-computer:~ seanmarimpietri$ python Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin Type help, copyright, credits or license for more information. python module1.py File stdin, line 1 python module1.py ^ SyntaxError: invalid syntax Again, any help would be appreciated. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: Help! Can't get program to run.
seanm...@gmail.com writes: sean-marimpietris-computer:~ seanmarimpietri$ python Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin Type help, copyright, credits or license for more information. python module1.py File stdin, line 1 python module1.py ^ SyntaxError: invalid syntax Again, any help would be appreciated. Thanks. From Terminal.app, this should work: sean-marimpietris-computer:~ seanmarimpietri$ python module1.py Assuming that your module1.py file is in /Users/seanmarimpietri/ -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Re: writing consecutive data to subprocess command 'more'
En Sat, 02 May 2009 15:53:17 -0300, SanPy jhmsm...@gmail.com escribió: I have this method that prints a given text via a subprocess command 'more' . It is like this: def print_by_page(text): if hasattr(sys.stdout, 'isatty') and sys.stdout.isatty(): viewer = 'more -EMR' proc = subprocess.Popen([viewer], shell=True, stdin=subprocess.PIPE, stderr=subprocess.PIPE) try: stdout, stderr = proc.communicate(text) except OSError: pass else: if stderr: # probably no 'more' available on this system sys.stdout.write(text) return sys.stdout.write(text) It works fine, but what I really want to do is first print a header through the 'more' command, then fetch some data from the web, and show it through the same 'more' command/process. And even more data, another header, other data from the web, all through the same 'more' command/process. Can somebody help me out on this? communicate writes to the child's stdin and waits for it to finish. If you want to keep writing, don't use communicate. And you'll need to keep state from one call to another, so use a class. Based on the code above, create a class Pager with __init__, write and close methods: class Pager: def __init__(self): # copy the logic above self.proc = subprocess.Popen(...) self.file = self.proc.stdin # if something goes wrong, set self.proc=None and self.file=sys.stdout def write(self, text): self.file.write(text) def close(self): if self.proc: self.file.close() self.proc.wait() Also, take a look at the pager function in the pydoc module (see the source) - it handles several cases. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Most Basic Question Ever - please help
I am going to try posting here again with more detail to see if I can finally get my first program to work. I am working on a MacBook Pro with OS X 10.4.11. I opened a new window in IDLE to create a file. The file had only one line of code and was saved as module1.py. I saved it to Macintosh HD. The one line of code in the file is copied below: print 'Hello module world!' I closed the file and tried to run it in IDLE and Terminal, but I have had no success. I'll paste my commands and the error messages below (for IDLE, then Terminal). Any help would be very much appreciated. I feel like the marathon just started and I've fallen flat on my face. Thanks. IDLE 2.6.2 python module1.py SyntaxError: invalid syntax sean-m-computer:~ seanm$ python Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin Type help, copyright, credits or license for more information. python module1.py File stdin, line 1 python module1.py ^ SyntaxError: invalid syntax -- http://mail.python.org/mailman/listinfo/python-list
Re: writing consecutive data to subprocess command 'more'
SanPy jhmsm...@gmail.com (S) wrote: S I have this method that prints a given text via a subprocess command S 'more' . It is like this: S def print_by_page(text): S if hasattr(sys.stdout, 'isatty') and sys.stdout.isatty(): S viewer = 'more -EMR' S proc = subprocess.Popen([viewer], shell=True, S stdin=subprocess.PIPE, S stderr=subprocess.PIPE) S try: S stdout, stderr = proc.communicate(text) S except OSError: S pass S else: S if stderr: # probably no 'more' available on this system S sys.stdout.write(text) S return S sys.stdout.write(text) S It works fine, but what I really want to do is first print a header S through the 'more' command, then fetch some data from the web, and S show it through the same 'more' command/process. And even more data, S another header, other data from the web, all through the same 'more' S command/process. S Can somebody help me out on this? You have to split this. Do the startup (creating the subprocess) once, and then for each piece of text that you want to pass through 'more' do stdout, stderr = proc.communicate(text) By the way, in this last line, stdout should come out empty because the output of more doesn't come back to the parent process, but goes to the original stdout of the calling script. Also I would use the following: viewer = ['more', '-EMR'] proc = subprocess.Popen(viewer, stdin=subprocess.PIPE, stderr=subprocess.PIPE) No reason to use a shell. And if there is no 'more' available you get an exception on the Popen already. You don't have to wait until the communicate call. -- Piet van Oostrum p...@cs.uu.nl URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org -- http://mail.python.org/mailman/listinfo/python-list
eric not working on ubuntu 9.04
any idea ? here is output: bvidi...@bvidinli-yenihdd:~$ eric Warning: translation file 'qt_tr_TR'could not be loaded. Using default. Warning: translation file 'qscintilla_tr_TR'could not be loaded. Using default. Exception RuntimeError: 'maximum recursion depth exceeded while calling a Python object' in type 'exceptions.AttributeError' ignored Exception RuntimeError: 'maximum recursion depth exceeded in __subclasscheck__' in type 'exceptions.AttributeError' ignored An unhandled exception occurred. Please report the problem using the error reporting dialog or via email to eric4-b...@die-offenbachs.de. A log has been written to /home/bvidinli/.eric4/eric4_error.log. Error information: 2009-05-02, 23:42:05 type 'exceptions.ImportError': cannot import name walk File /usr/share/eric/modules/eric4.py, line 250, in module main() File /usr/share/eric/modules/eric4.py, line 229, in main from UI.UserInterface import UserInterface File /usr/share/eric/modules/UI/UserInterface.py, line 66, in module from EmailDialog import EmailDialog File /usr/share/eric/modules/UI/EmailDialog.py, line 28, in module from email.MIMEBase import MIMEBase File /usr/lib/python2.6/email/__init__.py, line 79, in __getattr__ __import__(self.__name__) File /usr/lib/python2.6/email/mime/base.py, line 9, in module from email import message File /usr/lib/python2.6/email/message.py, line 90, in module class Message: File /usr/lib/python2.6/email/message.py, line 790, in Message from email.Iterators import walk Version Numbers: Python 2.6.2 KDE 4.2.2 PyKDE 4.0.2 Qt 4.5.0 PyQt4 4.4.4 sip sip version not available QScintilla 2.3.2 eric4 4.3.0 (r2852) Platform: linux2 2.6.2 (release26-maint, Apr 19 2009, 01:56:41) [GCC 4.3.3] Distribution Info: /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=9.04 DISTRIB_CODENAME=jaunty DISTRIB_DESCRIPTION=Ubuntu 9.04 bvidi...@bvidinli-yenihdd:~$ -- http://mail.python.org/mailman/listinfo/python-list
Re: Help! Can't get program to run.
On May 2, 4:30 pm, Arnaud Delobelle arno...@googlemail.com wrote: seanm...@gmail.com writes: sean-marimpietris-computer:~ seanmarimpietri$ python Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin Type help, copyright, credits or license for more information. python module1.py File stdin, line 1 python module1.py ^ SyntaxError: invalid syntax Again, any help would be appreciated. Thanks. From Terminal.app, this should work: sean-marimpietris-computer:~ seanmarimpietri$ python module1.py Assuming that your module1.py file is in /Users/seanmarimpietri/ -- Arnaud Awesome. Thank you, Arnaud. I moved the file to that folder, and I got it to work in Terminal. However, I still can't get it to run using IDLE. Any idea why that might be? Thanks again. -Sean -- http://mail.python.org/mailman/listinfo/python-list
return functions
Aldo i like the cerrypy wsgi server very much, i do not like the tools that go with it so i am stuck with a configuration file that looks like this http://pastebin.com/m4d8184bc After 152 line I finally arrived to a point where i was thinkig thats it, this is like going to work on a uni cycle and is just plain ridicules So how can i generate some functions something like def generate(url,type): # where type could be htm js css or wsgi -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiprocessing.Queue - I want to end.
Hendrik van Rooyen wrote: : Roel Schroeven rschroev_nospam...@fastmail.fm wrote: Hendrik van Rooyen schreef: I have always wondered why people do the one queue many getters thing. Because IMO it's the simplest and most elegant solution. That is fair enough... Given that the stuff you pass is homogenous in that it will require a similar amount of effort to process, is there not a case to be made to have as many queues as consumers, and to round robin the work? Could work if the processing time for each work unit is exactly the same (otherwise one or more consumers will be idle part of the time), but in most cases that is not guaranteed. A simple example is fetching data over the network: even if the data size is always the same, there will be differences because of network load variations. If you use one queue, each consumer fetches a new work unit as soon it has consumed the previous one. All consumers will be working as long as there is work to do, without having to write any code to do the load balancing. With one queue for each consumer, you either have to assume that the average processing time is the same (otherwise some consumers will be idle at the end, while others are still busy processing work units), or you need some clever code in the producer(s) or the driving code to balance the loads. That's extra complexity for little or no benefit. I like the simplicity of having one queue: the producer(s) put work units on the queue with no concern which consumer will process them or how many consumers there even are; likewise the consumer(s) don't know and don't need to know where their work units come from. And the work gets automatically distributed to whichever consumer has first finished its previous work unit. This is all true in the case of a job that starts, runs and finishes. I am not so sure it applies to something that has a long life. And if the stuff you pass around needs disparate effort to consume, it seems to me that you can more easily balance the load by having specialised consumers, instead of instances of one humungous I can eat anything consumer. If there is a semantic difference, maybe yes; but I think it makes no sense to differentiate purely on the expected execution times. The idea is basically that you have the code that classifies in one place only, instead of running in all the instances of the consumer. Feels better to me, somehow. snip If the classifying you're doing is just based on expected time to consume the item, then I think your plan to use separate queues is misguided. If the consumers are interchangeable in their abilities, then feeding them from a single queue is more efficient, both on average wait time, worst-case wait time, and on consumer utilization, in nearly all non-pathological scenarios. Think the line at the bank. There's a good reason they now have a single line for multiple tellers. If you have five tellers, and one of your transactions is really slow, the rest of the line is only slowed down by 20%, rather than a few people being slowed down by a substantial amount because they happen to be behind the slowpoke. 30 years ago, they'd have individual lines, and I tried in vain to explain queuing theory to the bank manager. Having said that, notice that sometimes the consumers in a computer are not independent. If you're running 20 threads with this model, on a processor with only two cores, and if the tasks are CPU bound, you're wasting lots of thread-management time without gaining anything. Similarly, if there are other shared resources that all the threads trip over, it may not pay to do as many of them in parallel. But for homogeneous consumers, do them with a single queue, and do benchmarks to determine the optimum number of consumers to start. -- http://mail.python.org/mailman/listinfo/python-list
Re: return functions
On May 2, 10:44 pm, gert gert.cuyk...@gmail.com wrote:
Aldo i like the cerrypy wsgi server very much, i do not like the tools
that go with it
so i am stuck with a configuration file that looks like this
http://pastebin.com/m4d8184bc
After 152 line I finally arrived to a point where i was thinkig thats
it, this is like going to work on a uni cycle and is just plain
ridicules
So how can i generate some functions something like
def generate(url,type): # where type could be htm js css or wsgi
I was thinking something like this ?
def static(url, mime):
def application(environ, response):
f=open(os.path.join(os.path.dirname(__file__), url),'rb')
l=os.fstat(f.fileno()).st_size
response('200 OK', [('Content-type', mime+';charset=utf-8'),
('Content-Length', str(l))])
return FileWrapper(f, 8192)
return application
--
http://mail.python.org/mailman/listinfo/python-list
Re: writing consecutive data to subprocess command 'more'
Thanks, that works beautifully! Regards, Sander On 2 mei, 22:35, Gabriel Genellina gagsl-...@yahoo.com.ar wrote: En Sat, 02 May 2009 15:53:17 -0300, SanPy jhmsm...@gmail.com escribió: I have this method that prints a given text via a subprocess command 'more' . It is like this: def print_by_page(text): if hasattr(sys.stdout, 'isatty') and sys.stdout.isatty(): viewer = 'more -EMR' proc = subprocess.Popen([viewer], shell=True, stdin=subprocess.PIPE, stderr=subprocess.PIPE) try: stdout, stderr = proc.communicate(text) except OSError: pass else: if stderr: # probably no 'more' available on this system sys.stdout.write(text) return sys.stdout.write(text) It works fine, but what I really want to do is first print a header through the 'more' command, then fetch some data from the web, and show it through the same 'more' command/process. And even more data, another header, other data from the web, all through the same 'more' command/process. Can somebody help me out on this? communicate writes to the child's stdin and waits for it to finish. If you want to keep writing, don't use communicate. And you'll need to keep state from one call to another, so use a class. Based on the code above, create a class Pager with __init__, write and close methods: class Pager: def __init__(self): # copy the logic above self.proc = subprocess.Popen(...) self.file = self.proc.stdin # if something goes wrong, set self.proc=None and self.file=sys.stdout def write(self, text): self.file.write(text) def close(self): if self.proc: self.file.close() self.proc.wait() Also, take a look at the pager function in the pydoc module (see the source) - it handles several cases. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Help! Can't get program to run.
On Sat, 02 May 2009 21:42:03 +0100, seanm...@gmail.com wrote: Awesome. Thank you, Arnaud. I moved the file to that folder, and I got it to work in Terminal. However, I still can't get it to run using IDLE. Any idea why that might be? Thanks again. -Sean To repeat what you were told earlier, IDLE is an interactive Python shell, not a command line. It executes Python commands directly, like print Hello, world python mymodule.py is *not* a Python command. To run your script from within IDLE, you have two choices: either open the script to edit with IDLE (menu File-Open or Ctrl-O) and use menu Run-Run Module or F5 to run it; or (assuming mymodule.py is in your home directory) type import mymodule The former has a few gotchas that you probably won't hit, and the latter has several that you almost certainly will hit. Personally I'd stick with the command line that you've already succeeded with! -- Rhodri James *-* Wildebeeste Herder to the Masses -- http://mail.python.org/mailman/listinfo/python-list
Re: Help! Can't get program to run.
In article 8f6634a2-c977-430a-b9f2-90ef9356d...@x6g2000vbg.googlegroups.com, seanm...@gmail.com wrote: Thank you for both for the help. I still cannot get the program to run though. Below I've copied my commands and the error messages for you (in IDLE then Terminal): IDLE 2.6.2 python module1.py SyntaxError: invalid syntax The default IDLE window is a python shell window. That is, you are already inside the python interpreter, the same as if you typed just python, with no file name, in the Terminal window. You can use that to execute python statements and introspect objects, among other things. Try it. But, back in IDLE, ignore that window for the moment and use the Open command in the File Menu to select and open your file module1.py from whatever directory it is in. A new window should open with the contents of that file. With that window selected (click on it, if necessary), there should be a Run option in the Menu bar and under it will be a Run Script option that will cause the script to run and the output to appear in the shell window. You can then explore the other options available in IDLE for debugging, etc. -- Ned Deily, n...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
Need Help with str.replace tuples
Hello. I am very very unfamiliar with Python and need to update a Python script. What I need to do is to replace three variables (already defined in the script) within a string. The present script correctly replaces two of the three variables. I am unable to add a third variable. Specifically, I would like to add panoble,panoble to the following code: idxItemStr+=string.replace(string.replace (idxItemTplStr,stylenumber,stylenumber),formalname,formalname) and, specifically as regards idxItemTplStr Is this possible? Thanks Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: Most Basic Question Ever - please help
IDLE 2.6.2 python module1.py SyntaxError: invalid syntax The prompt is Python's interactive interpreter. Once you are here, you already are in python-- so typing python again is redundant and invalid. From this prompt you type in python code. I have never used IDLE so can't comment on how to get it to run modules and collect output-- but I suspect when your file is open in IDLE there's a menu option that says something about Run. But sean-m-computer:~ seanm$ python Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin Type help, copyright, credits or license for more information. python module1.py File stdin, line 1 python module1.py ^ SyntaxError: invalid syntax Same thing. You're starting python: then doing 'python module1.py' within Python, which doesn't make sense. If you want Python to run the module, just do python module1.py instead of python from your command prompt. --S -- http://mail.python.org/mailman/listinfo/python-list
Re: Most Basic Question Ever - please help
seanm...@gmail.com wrote: I am going to try posting here again with more detail to see if I can finally get my first program to work. I am working on a MacBook Pro with OS X 10.4.11. I opened a new window in IDLE to create a file. The file had only one line of code and was saved as module1.py. I saved it to Macintosh HD. The one line of code in the file is copied below: print 'Hello module world!' I closed the file and tried to run it in IDLE and Terminal, but I have had no success. I'll paste my commands and the error messages below (for IDLE, then Terminal). Any help would be very much appreciated. I feel like the marathon just started and I've fallen flat on my face. Thanks. IDLE 2.6.2 python module1.py SyntaxError: invalid syntax sean-m-computer:~ seanm$ python Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin Type help, copyright, credits or license for more information. python module1.py File stdin, line 1 python module1.py ^ SyntaxError: invalid syntax In both cases, you're already running python. Why would you expect to have to run python inside python? Once you're at a python prompt (in either of your cases), you use the command import to load a module. And you do not put the .py extension on the parameter. Specifically, it should look like this, and very similar for IDLE. M:\Programming\Python\sources\tempc:\ProgFiles\Python26\python.exe Python 2.6.2 (r262:71605, Apr 14 2009, 22:40:02) [MSC v.1500 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. import module1 Hello module world! -- http://mail.python.org/mailman/listinfo/python-list
Re: Dictionary, integer compression
dineshv: Thanks for that about Python3. My integers range from 0 to 9,999,999 and I have loads of them. Do you think Python3 will help? Nope. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: return functions
On May 2, 10:58 pm, gert gert.cuyk...@gmail.com wrote:
On May 2, 10:44 pm, gert gert.cuyk...@gmail.com wrote:
Aldo i like the cerrypy wsgi server very much, i do not like the tools
that go with it
so i am stuck with a configuration file that looks like this
http://pastebin.com/m4d8184bc
After 152 line I finally arrived to a point where i was thinkig thats
it, this is like going to work on a uni cycle and is just plain
ridicules
So how can i generate some functions something like
def generate(url,type): # where type could be htm js css or wsgi
I was thinking something like this ?
def static(url, mime):
def application(environ, response):
f=open(os.path.join(os.path.dirname(__file__), url),'rb')
l=os.fstat(f.fileno()).st_size
response('200 OK', [('Content-type', mime+';charset=utf-8'),
('Content-Length', str(l))])
return FileWrapper(f, 8192)
return application
it works, i reduced it to this :-)
http://code.google.com/p/appwsgi/source/browse/trunk/server.py
any other suggestions to make it smaller and more automatic ?
--
http://mail.python.org/mailman/listinfo/python-list
Re: Need Help with str.replace tuples
mikefromvt: I am very very unfamiliar with Python and need to update a Python script. What I need to do is to replace three variables (already defined in the script) within a string. The present script correctly replaces two of the three variables. I am unable to add a third variable. Specifically, I would like to add panoble,panoble to the following code: idxItemStr+=string.replace(string.replace (idxItemTplStr,stylenumber,stylenumber),formalname,formalname) This isn't going to win some contest of coding style quality, but you may try this (for other people: I have not added any new variable name on purpose): idxItemStr += idxItemTplStr.replace(stylenumber, stylenumber).replace(formalname, formalname).replace(panoble, panoble) Note that in Python names are usually written like this: idx_item_tpl Instead of: idxItemTplStr Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: Most Basic Question Ever - please help
On May 3, 7:46 am, Dave Angel da...@ieee.org wrote: seanm...@gmail.com wrote: I am going to try posting here again with more detail to see if I can finally get my first program to work. I am working on a MacBook Pro with OS X 10.4.11. I opened a new window in IDLE to create a file. The file had only one line of code and was saved as module1.py. I saved it to Macintosh HD. The one line of code in the file is copied below: print 'Hello module world!' I closed the file and tried to run it in IDLE and Terminal, but I have had no success. I'll paste my commands and the error messages below (for IDLE, then Terminal). Any help would be very much appreciated. I feel like the marathon just started and I've fallen flat on my face. Thanks. IDLE 2.6.2 python module1.py SyntaxError: invalid syntax sean-m-computer:~ seanm$ python Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin Type help, copyright, credits or license for more information. python module1.py File stdin, line 1 python module1.py ^ SyntaxError: invalid syntax In both cases, you're already running python. Why would you expect to have to run python inside python? Once you're at a python prompt (in either of your cases), you use the command import to load a module. And you do not put the .py extension on the parameter. Specifically, it should look like this, and very similar for IDLE. M:\Programming\Python\sources\tempc:\ProgFiles\Python26\python.exe Python 2.6.2 (r262:71605, Apr 14 2009, 22:40:02) [MSC v.1500 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. import module1 Hello module world! Dave, importing modules which have side effects like printing is NOT a good habit to which a beginner should be introduced. He needs to know how to run a script. Sean, in Terminal, instead of typing python type python module1.py and I suggest that you give your script (not module) a more meaningful name. HTH, John -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with money datatype based calculations in python
On May 3, 12:09 am, Dave Angel da...@ieee.org wrote: Krishnakant wrote: hello all, I am using postgresql as a database server for my db application. The database is related to accounts and point of sales and many calculations involve money datatype. The application logic is totally done in python. Now the problem is that there is a situation where we calculate tax on % of the total amount on the invoice. The percentage is in terms of float but the eventual amount has to be in a money datatype. The product cost comes in money datatype from postgresql and the tax % comes in float. So I would like to know if python supports some thing similar to money datatype so that I can cast my total amount (in money ) divided by tax% (in float ) so money divided by float should be the result and that result should be in money datatype. For example a product x has the cost Rs. 100 which is stored in the tabel as money type. and in the tax table for that product the VAT is 5% and this 5% is stored in float datatype. So after using both these values the resulting total 105Rs. should be in money type and not float. I awaite some reply, Thanks in advice. happy hacking. Krishnakant. Tax rate isn't divided, it's multiplied. But probably that's just a typo in your message. Short answer is use your money class to convert the float into money. And then test, to see that's really what you wanted. Be sure and check the edge cases, because float is a binary system, and you can get both quantization and rounding problems converting between them. Is the money you're dealing with decimal-based? So maybe money values are integers plus two more digits of fractional precision? It's going to be tough for somebody with no access to that money type to guess what your problem is. What operations does it currently support? If it supports multiply, then just change the tax rate to be a money type. Aarrgghh!! If the money type supports multiplying money by money, the author should be put in the stocks and pelted with rotten vegetables. (IMHO) -- http://mail.python.org/mailman/listinfo/python-list
Re: for with decimal values?
Esmail ebo...@hotmail.com writes: Hello all, Is there a Python construct to allow me to do something like this: for i in range(-10.5, 10.5, 0.1): ... Note that those values are of type ‘float’, which is a distinct type from ‘Decimal’ with very different behaviour. If there is such a thing already available, I'd like to use it, otherwise I can write a function to mimic this, but I thought I'd check (my search yielded nothing). You can write a function to do it. Alternatively, this case seems simple enough that you can write a generator expression. Assuming you want ‘Decimal’ values: from decimal import Decimal amounts = (Decimal(mantissa)/10 for mantissa in range(-105, 105)) for amount in amounts: ... print amount ... -10.5 -10.4 -10.3 -10.2 -10.1 -10 -9.9 … 9.6 9.7 9.8 9.9 10 10.1 10.2 10.3 10.4 -- \ “I have a large seashell collection, which I keep scattered on | `\the beaches all over the world. Maybe you've seen it.” —Steven | _o__) Wright | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: Help! Can't get program to run.
On May 2, 5:30 pm, Ned Deily n...@acm.org wrote: In article 8f6634a2-c977-430a-b9f2-90ef9356d...@x6g2000vbg.googlegroups.com, seanm...@gmail.com wrote: Thank you for both for the help. I still cannot get the program to run though. Below I've copied my commands and the error messages for you (in IDLE then Terminal): IDLE 2.6.2 python module1.py SyntaxError: invalid syntax The default IDLE window is a python shell window. That is, you are already inside the python interpreter, the same as if you typed just python, with no file name, in the Terminal window. You can use that to execute python statements and introspect objects, among other things. Try it. But, back in IDLE, ignore that window for the moment and use the Open command in the File Menu to select and open your file module1.py from whatever directory it is in. A new window should open with the contents of that file. With that window selected (click on it, if necessary), there should be a Run option in the Menu bar and under it will be a Run Script option that will cause the script to run and the output to appear in the shell window. You can then explore the other options available in IDLE for debugging, etc. -- Ned Deily, n...@acm.org Awesome. I think that clears it up (at least enough for now). Thank you both very much. -- http://mail.python.org/mailman/listinfo/python-list
Re: Most Basic Question Ever - please help
On May 2, 6:25 pm, John Machin sjmac...@lexicon.net wrote: On May 3, 7:46 am, Dave Angel da...@ieee.org wrote: seanm...@gmail.com wrote: I am going to try posting here again with more detail to see if I can finally get my first program to work. I am working on a MacBook Pro with OS X 10.4.11. I opened a new window in IDLE to create a file. The file had only one line of code and was saved as module1.py. I saved it to Macintosh HD. The one line of code in the file is copied below: print 'Hello module world!' I closed the file and tried to run it in IDLE and Terminal, but I have had no success. I'll paste my commands and the error messages below (for IDLE, then Terminal). Any help would be very much appreciated. I feel like the marathon just started and I've fallen flat on my face. Thanks. IDLE 2.6.2 python module1.py SyntaxError: invalid syntax sean-m-computer:~ seanm$ python Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin Type help, copyright, credits or license for more information. python module1.py File stdin, line 1 python module1.py ^ SyntaxError: invalid syntax In both cases, you're already running python. Why would you expect to have to run python inside python? Once you're at a python prompt (in either of your cases), you use the command import to load a module. And you do not put the .py extension on the parameter. Specifically, it should look like this, and very similar for IDLE. M:\Programming\Python\sources\tempc:\ProgFiles\Python26\python.exe Python 2.6.2 (r262:71605, Apr 14 2009, 22:40:02) [MSC v.1500 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. import module1 Hello module world! Dave, importing modules which have side effects like printing is NOT a good habit to which a beginner should be introduced. He needs to know how to run a script. Sean, in Terminal, instead of typing python type python module1.py and I suggest that you give your script (not module) a more meaningful name. HTH, John Great. Thank you both very much. I appreciate the help. -- http://mail.python.org/mailman/listinfo/python-list
Re: web access through vpn client
On May 2, 3:01 am, Martin P. Hellwig martin.hell...@dcuktec.org wrote: mark.sea...@gmail.com wrote: On May 1, 5:57 pm, Martin P. Hellwig martin.hell...@dcuktec.org wrote: mark.sea...@gmail.com wrote: Hi; I am trying to retrieve financial data off website for stock market analysis. Just hobby not for pay. I actually am impressed that urllib2 and BeautifulSoup work pretty well to do what I want, and the first little routine actually gets the data from the web page... except if my VPN client is turned on. I've looked around for a solution but can't find... perhaps I'm not entering the right search words. I don't even know where to start. Can anyone suggest some good reading, or basic idea how to approach? Thanks, Mark When the VPN client is on, can you actually still browse the 'classical' way to the website in question? I ask this because many cooperate VPN clients have a way of shutting down all other access besides to the VPN server (which is very annoying but I can see the logic behind it). If that is the case your VPN network might have a webproxy which needs to be configured to continue browsing when connected to the VPN. For python you can automate this by checking for access to the proxy and use it if it is there. -- MPHhttp://blog.dcuktec.com Yes when Cisco AnyConnect VPN client is connected, I can browse w/ IE. I think the packets get encrypted and possibly go to my company's server and out from there, because then also Outlook connects to my company, Communicator works, etc. With VPN off I can browse and Python can get URL, but no connection through my company's server no encryption. Where can I find out more about how to configure the webproxy, if the info is handy? Thanks! Mark Most likely your IE gets automatically configured for using a proxy when the VPN is made, just check your IE settings ounce you are connected to the VPN particular the Connection / LAN-connection settings. Or query what is set in the registry at : 'HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings' And use the content (if set) as the proxy address in the urllib module. You might find this module useful for that:http://docs.python.org/library/_winreg.html -- MPHhttp://blog.dcuktec.com- Hide quoted text - - Show quoted text - Thanks! I'll check it out. -- http://mail.python.org/mailman/listinfo/python-list
Re: for with decimal values?
Ben Finney wrote: Note that those values are of type ‘float’, which is a distinct type from ‘Decimal’ with very different behaviour. If there is such a thing already available, I'd like to use it, otherwise I can write a function to mimic this, but I thought I'd check (my search yielded nothing). You can write a function to do it. Alternatively, this case seems simple enough that you can write a generator expression. Assuming you want ‘Decimal’ values: from decimal import Decimal amounts = (Decimal(mantissa)/10 for mantissa in range(-105, 105)) for amount in amounts: ... print amount ... Another nice solution stored away for use! Thanks, Esmail -- http://mail.python.org/mailman/listinfo/python-list
Can someone please explain to me this code?
Hello,
I was trying to find a method to make global hotkeys with python in
linux. I found this one which uses a library called python-xlib. The
point is that since i dont have much experience with this, i cant
understand some of the code. Can someone please explain to me how this
code works? According to the author, it is meant to reduce and
increase volume. Im not interested in that specifically. All i want is
to be ale to bind a hotkey to a function in my python program.
from Xlib.display import Display
from Xlib import X
import oss
# custom keys from my dell D400 Laptop
vol_plus = 176
vol_moins = 174
keys = [vol_plus,vol_moins]
def changeVolume(aValue):
mixer = oss.open_mixer()
symbol = oss.SOUND_DEVICE_LABELS.index('Vol ')
left,right = mixer.read_channel(symbol)
avg = (left + right) / 2
if (avg + aValue) = 0:
mixer.write_channel(symbol,(left + aValue,right + aValue))
mixer.close()
def handle_event(aEvent):
keycode = aEvent.detail
if aEvent.type == X.KeyPress:
if keycode == vol_moins:
changeVolume(-2)
elif keycode == vol_plus:
changeVolume(+2)
def main():
# current display
disp = Display()
root = disp.screen().root
# we tell the X server we want to catch keyPress event
root.change_attributes(event_mask = X.KeyPressMask)
for keycode in keys:
root.grab_key(keycode, X.AnyModifier, 1,X.GrabModeAsync, X.GrabModeAsync)
while 1:
event = root.display.next_event()
handle_event(event)
if __name__ == '__main__':
main()
Regards
Soumen
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Re: eval(WsgiApplication)
How do I do this in python3? What's wrong with importing it? The problem is that my wsgi files have a wsgi extention for mod_wsgi use .. mod_wsgi has a .wsgi handler because it is recommended to rename the wsgi file with wsgi extensions to avoid double imports cherrypy server has a dispatcher class You can either use .py extension for the wsgi files OR use a custom importer that can import your .wsgi files http://docs.python.org/library/modules.html -- дамјан ( http://softver.org.mk/damjan/ ) Scarlett Johansson: You always see the glass half-empty. Woody Allen: No. I see the glass half-full, but of poison. -- http://mail.python.org/mailman/listinfo/python-list
Re: eval(WsgiApplication)
On May 2, 2:15 pm, Дамјан Георгиевски gdam...@gmail.com wrote: How do I do this in python3? What's wrong with importing it? The problem is that my wsgi files have a wsgi extention for mod_wsgi use .. mod_wsgi has a .wsgi handler because it is recommended to rename the wsgi file with wsgi extensions to avoid double imports cherrypy server has a dispatcher class You can either use .py extension for the wsgi files OR use a custom importer that can import your .wsgi fileshttp://docs.python.org/library/modules.html -- дамјан (http://softver.org.mk/damjan/) Scarlett Johansson: You always see the glass half-empty. Woody Allen: No. I see the glass half-full, but of poison. I stick with the .py files thank you :) -- http://mail.python.org/mailman/listinfo/python-list
Re: return functions
On May 3, 12:17 am, gert gert.cuyk...@gmail.com wrote:
On May 2, 10:58 pm, gert gert.cuyk...@gmail.com wrote:
On May 2, 10:44 pm, gert gert.cuyk...@gmail.com wrote:
Aldo i like the cerrypy wsgi server very much, i do not like the tools
that go with it
so i am stuck with a configuration file that looks like this
http://pastebin.com/m4d8184bc
After 152 line I finally arrived to a point where i was thinkig thats
it, this is like going to work on a uni cycle and is just plain
ridicules
So how can i generate some functions something like
def generate(url,type): # where type could be htm js css or wsgi
I was thinking something like this ?
def static(url, mime):
def application(environ, response):
f=open(os.path.join(os.path.dirname(__file__), url),'rb')
l=os.fstat(f.fileno()).st_size
response('200 OK', [('Content-type', mime+';charset=utf-8'),
('Content-Length', str(l))])
return FileWrapper(f, 8192)
return application
it works, i reduced it to this :-)
http://code.google.com/p/appwsgi/source/browse/trunk/server.py
any other suggestions to make it smaller and more automatic ?
Wait a minute why am i not using this ?
http://docs.python.org/3.0/library/wsgiref.html#wsgiref.util.request_uri
And just make my own server ?
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yet another list comprehension question
I'm trying to set up a simple filter using a list comprehension. If I have a list of tuples, a = [(1,2), (3,4), (5,None), (6,7), (8, None)] and I wanted to filter out all tuples containing None, I would like to get the new list b = [(1,2), (3,4),(6,7)]. I tried b = [i for i in a if t for t in i is not None] but I get the error that t is not defined. What am I doing wrong? -- http://mail.python.org/mailman/listinfo/python-list
Re: yet another list comprehension question
On Sat, May 2, 2009 at 7:13 PM, Ross ross.j...@gmail.com wrote: I'm trying to set up a simple filter using a list comprehension. If I have a list of tuples, a = [(1,2), (3,4), (5,None), (6,7), (8, None)] and I wanted to filter out all tuples containing None, I would like to get the new list b = [(1,2), (3,4),(6,7)]. b = [tup for tup in a if None not in tup] Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: yet another list comprehension question
On May 2, 7:21 pm, Chris Rebert c...@rebertia.com wrote: On Sat, May 2, 2009 at 7:13 PM, Ross ross.j...@gmail.com wrote: I'm trying to set up a simple filter using a list comprehension. If I have a list of tuples, a = [(1,2), (3,4), (5,None), (6,7), (8, None)] and I wanted to filter out all tuples containing None, I would like to get the new list b = [(1,2), (3,4),(6,7)]. b = [tup for tup in a if None not in tup] Cheers, Chris --http://blog.rebertia.com Thanks I feel retarded sometimes. -- http://mail.python.org/mailman/listinfo/python-list
Re: yet another list comprehension question
On May 2, 10:13 pm, Ross ross.j...@gmail.com wrote: I'm trying to set up a simple filter using a list comprehension. If I have a list of tuples, a = [(1,2), (3,4), (5,None), (6,7), (8, None)] and I wanted to filter out all tuples containing None, I would like to get the new list b = [(1,2), (3,4),(6,7)]. try this: b = [i for i in a if None not in i] I tried b = [i for i in a if t for t in i is not None] but I get the error that t is not defined. What am I doing wrong? You've got a for and an if backwards. t isn't defined when the if tries to evaluate it. -- http://mail.python.org/mailman/listinfo/python-list
Re: Can someone please explain to me this code?
On Sat, May 2, 2009 at 9:41 PM, Soumen banerjee soume...@gmail.com wrote: Hello, I was trying to find a method to make global hotkeys with python in linux. I found this one which uses a library called python-xlib. The point is that since i dont have much experience with this, i cant understand some of the code. Can someone please explain to me how this code works? According to the author, it is meant to reduce and increase volume. Im not interested in that specifically. All i want is to be ale to bind a hotkey to a function in my python program. It's not so hard. Just a little confusing at first. The thing is that X is a client-server protocol, so it doesn't call a function or anything to let you know that the user has pressed a key- it just sends all the events you've asked for to your application, and lets it handle them how it will. To get a better idea about how that happens, fire up xev (the X Event Viewer) on your console. from Xlib.display import Display from Xlib import X You still need these def handle_event(aEvent): keycode = aEvent.detail if aEvent.type == X.KeyPress: if keycode == vol_moins: changeVolume(-2) elif keycode == vol_plus: changeVolume(+2) (Spacing mine) You don't really care about this, but the important thing is how it's structured. It takes an event, then gets its detail attribute, which is where the key that is pressed will go if it is a keypress, then sees if its type is KeyPress, then performs the appropriate action based on that keycode. Your app will do pretty much the same thing, just with different actions. def main(): # current display disp = Display() root = disp.screen().root # we tell the X server we want to catch keyPress event root.change_attributes(event_mask = X.KeyPressMask) for keycode in keys: root.grab_key(keycode, X.AnyModifier, 1,X.GrabModeAsync, X.GrabModeAsync) while 1: event = root.display.next_event() handle_event(event) if __name__ == '__main__': main() (spacing mine) While I'd do things a little differently, this is pretty much boilerplate. You can use this as a template for what you want to do, assuming that you've appropriately defined your keycodes and handle_event function. Geremy Condra -- http://mail.python.org/mailman/listinfo/python-list
Multiprocessing + Frozen bug?
In the multiprocessing.forking module, there's: def get_command_line(): ... if getattr(sys, 'frozen', False): return [sys.executable, '--multiprocessing-fork'] else: prog = 'from multiprocessing.forking import main; main()' return [_python_exe, '-c', prog, '--multiprocessing-fork'] I think that the test there should be if not getattr(sys, 'frozen', False):, because if its not frozen then you want to use the sys.executable -- but if it is, you want to use the one which has been explicitly set. I think, at least. I'm not quite sure if I want to report it as a bug yet because I'm very new to multiprocessing and am doing something very complicated (a windows service using multiprocessing to start various processes, each of which start arbitrary thirdparty-non-python subprocesses themselves) so maybe my understanding is wrong. Or iiis it not? --S -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with money datatype based calculations in python
On Sun, 03 May 2009 00:07:17 +0530 Krishnakant krm...@gmail.com wrote: On Sat, 2009-05-02 at 11:57 -0400, D'Arcy J.M. Cain wrote: And if you use PyGreSQL (http://www.PyGreSQL.org/) to connect to the database then the money type is already converted to Decimal. d'arcy, I visited the home page for pygresql and discovered that you wrote the library. Sorry, I should have mentioned my bias. :-) I am happy that you also included a non-dbapi (postgresql classic interface ) along with the standard DBAPI module. That interface existed before there was a DB-API spec. We added the DB-API interface later and decided to support both. I would like to know if it has been tested with postgresql 8.3 and are The current version of PyGreSQL has been tested with Python 2.5 and PostGreSQL 8.3. Older version should work as well, but you will need at least Python 2.3 and PostgreSQL 7.4. there any known bottlenecks while using this driver module on large scale database opperations? None that I know of. It is used on some pretty big databases that I know of. Is this actively maintained? Yes. I'll leave the rest of the questions for someone less biased. :-) -- D'Arcy J.M. Cain da...@druid.net | Democracy is three wolves http://www.druid.net/darcy/| and a sheep voting on +1 416 425 1212 (DoD#0082)(eNTP) | what's for dinner. -- http://mail.python.org/mailman/listinfo/python-list
Re: Can someone please explain to me this code?
Hello, I'd like a little more help with the following lines: root.change_attributes(event_mask = X.KeyPressMask) for keycode in keys: root.grab_key(keycode, X.AnyModifier, 1,X.GrabModeAsync, X.GrabModeAsync) what exactly do they do? regards Soumen -- http://mail.python.org/mailman/listinfo/python-list
Re: Most Basic Question Ever - please help
On May 2, 4:36 pm, seanm...@gmail.com wrote: I am going to try posting here again with more detail to see if I can finally get my first program to work. I am working on a MacBook Pro with OS X 10.4.11. I opened a new window in IDLE to create a file. The file had only one line of code and was saved as module1.py. I saved it to Macintosh HD. The one line of code in the file is copied below: print 'Hello module world!' I closed the file and tried to run it in IDLE and Terminal, but I have had no success. I'll paste my commands and the error messages below (for IDLE, then Terminal). Any help would be very much appreciated. I feel like the marathon just started and I've fallen flat on my face. Thanks. IDLE 2.6.2 python module1.py SyntaxError: invalid syntax sean-m-computer:~ seanm$ python Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin Type help, copyright, credits or license for more information. python module1.py File stdin, line 1 python module1.py ^ SyntaxError: invalid syntax Sean, also, keep in mind you can use IDLE to run your scripts. After you have saved a script/program, there is an option for Run in the menu, and then under that, Run Module. The output of the script will be sent to IDLE window indicated as the Python shell. You can also just test code directly from within that shell, though for multi-line programs, it is easier within the composing window. I suggest you sign up for the Python tutor list: http://mail.python.org/mailman/listinfo/tutor And you can search through their big archive of questions and answers here: http://www.nabble.com/Python---tutor-f2981.html The tutors there are great and super-helpful, and will field any level of question but are particularly good for absolute beginners. Here is a tutorial on using IDLE: http://hkn.eecs.berkeley.edu/~dyoo/python/idle_intro/index.html And here is a very good general programming tutorial online book, focusing on Python: http://www.freenetpages.co.uk/hp/alan.gauld/ Good luck! Che -- http://mail.python.org/mailman/listinfo/python-list
Doc strings in descriptors
I have a simple descriptor to create a cached property as shown below. class cproperty(object): Property whose value is only calculated once and cached def __init__(self, func): self._func = func self.__doc__ = func.__doc__ def __get__(self, obj, type=None): if obj is None: return self try: return getattr(obj, '@%s' % self._func.func_name) except AttributeError: result = self._func(obj) setattr(obj, '@%s' % self._func.func_name, result) return result The problem is that when I use the help() function on them, I don't get the doc string from the function that is being wrapped. Instead, I get the following: hasEmployees = StudioManager.utils.cproperty object at 0xf126f0 What do I need to do to get the doc string of the wrapped function to apper when using help()? -- Kevin D. Smith -- http://mail.python.org/mailman/listinfo/python-list
Re: eval(WsgiApplication)
On May 2, 10:15 pm, Дамјан Георгиевски gdam...@gmail.com wrote:
How do I do this in python3?
What's wrong with importing it?
The problem is that my wsgi files have a wsgi extention for mod_wsgi
use
..
mod_wsgi has a .wsgi handler because it is recommended to rename the
wsgi file with wsgi extensions to avoid double imports
cherrypy server has a dispatcher class
You can either use .py extension for the wsgi files OR use a custom
importer that can import your .wsgi
fileshttp://docs.python.org/library/modules.html
You don't have to go to such an extreme if it is only for one file to
be used as root WSGI application. Can use something like:
def load_script(filename, label='__wsgi__'):
module = imp.new_module(label)
module.__file__ = filename
execfile(filename, module.__dict__)
return module
module = load_script('/some/path/file.wsgi')
application = module.application
Graham
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Re: return functions
On May 3, 6:44 am, gert gert.cuyk...@gmail.com wrote: Aldo i like the cerrypywsgiserver very much, i do not like the tools that go with it so i am stuck with a configuration file that looks like this http://pastebin.com/m4d8184bc After 152 line I finally arrived to a point where i was thinkig thats it, this is like going to work on a uni cycle and is just plain ridicules So how can i generate some functions something like def generate(url,type): # where type could be htm js css orwsgi You seem to have finally discovered that when using Apache/mod_wsgi, Apache does a level of URL matching to filesystem based resources. This isn't automatic in normal WSGI servers unless you use a WSGI middleware that does the mapping for you. :-) Graham -- http://mail.python.org/mailman/listinfo/python-list
[issue5901] missing meta-info in documentation pdf
New submission from Vito De Tullio vito.detul...@gmail.com: from http://docs.python.org/download.html and http://docs.python.org/3.0/download.html you can download the python documentation in many formats (html, pdf, txt), I think auto-generated by the .rst source. While html and txt does not, the pdf format, supports some simple meta-data infos about the document: other than the number of pages, the page size, the creator, etc... (all auto-filled) there are 4 keys that the current pdf miss to fill and I think it's important: Title, Subject, Keywords, and Author. try, for example, to use the simple pdfinfo tool (from http://poppler.freedesktop.org/) to inspect the current pdf $ tar xvjf python-3.0.1-docs-pdf-a4.tar.bz2 $ cd docs-pdf $ ls -1 c-api.pdf distutils.pdf documenting.pdf extending.pdf howto-advocacy.pdf howto-cporting.pdf howto-curses.pdf howto-doanddont.pdf howto-functional.pdf howto-regex.pdf howto-sockets.pdf howto-unicode.pdf howto-urllib2.pdf howto-webservers.pdf install.pdf library.pdf reference.pdf tutorial.pdf using.pdf whatsnew.pdf $ pdfinfo library.pdf Title: Subject: Keywords: Author: Creator:LaTeX with hyperref package Producer: pdfTeX-1.40.9 CreationDate: Sat Feb 14 11:33:09 2009 ModDate:Sat Feb 14 11:33:09 2009 Tagged: no Pages: 1077 Encrypted: no Page size: 595.276 x 841.89 pts (A4) File size: 7556857 bytes Optimized: no PDF version:1.4 erh, what is supposed to contain using.pdf? and distutils.pdf? (Yes, I know what they contain, but...) If the pdf were tagged, not only me, but also my OS will know what's in these pdf (see nepomuk/strigi/tracker/beagle programs, helping me find what I'm searching -- assignee: georg.brandl components: Documentation messages: 86931 nosy: ZeD, georg.brandl severity: normal status: open title: missing meta-info in documentation pdf type: resource usage versions: Python 3.1 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue5901 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue5901] missing meta-info in documentation pdf
Georg Brandl ge...@python.org added the comment: I thought we already did assign these metadata items; looks like it's been messed up somehow. I'll fix this. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue5901 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue5902] Stricter codec names
New submission from Ezio Melotti ezio.melo...@gmail.com:
I noticed that codec names[1]:
1) can contain random/unnecessary spaces and punctuation;
2) have several aliases that could probably be removed;
A few examples of valid codec names (done with Python 3):
s = 'xxx'
s.encode('utf')
b'xxx'
s.encode('utf-')
b'xxx'
s.encode('}Utf~-8-~siG{ ;)')
b'\xef\xbb\xbfxxx'
'utf' is an alias for UTF-8 and that doesn't quite make sense to me that
'utf' alone refers to UTF-8.
'utf-' could be a mistyped 'utf-8', 'utf-7' or even 'utf-16'; I'd like
it to raise an error instead.
The third example is not probably something that can be found in the
real world (I hope) but it shows how permissive the parsing of the names is.
Apparently the whitespaces are removed and the punctuation is used to
split the name in several parts and then the check is performed.
About the aliases: in the documentation the official name for the
UTF-8 codec is 'utf_8' and there are 3 more aliases: U8, UTF, utf8. For
ISO-8859-1, the official name is 'latin_1' and there are 7 more
aliases: iso-8859-1, iso8859-1, 8859, cp819, latin, latin1, L1.
The Zen says There should be one—and preferably only one—obvious way to
do it., so I suggest to
1) disallow random punctuation and spaces within the name (only allow
leading and trailing spaces);
2) change the default names to, for example: 'utf-8', 'iso-8859-1'
instead of 'utf_8' and 'iso8859_1'. The name are case-insentive.
3) remove the unnecessary aliases, for example: 'UTF', 'U8' for UTF-8
and 'iso8859-1', '8859', 'latin', 'L1' for ISO-8859-1;
This last point could break some code and may need some
DeprecationWarning. If there are good reason to keep around these codecs
only the other two issues can be addressed.
If the name of the codec has to be a valid variable name (that is,
without '-'), only the documentation could be changed to have 'utf-8',
'iso-8859-1', etc. as preferred name.
[1]: http://docs.python.org/library/codecs.html#standard-encodings
http://docs.python.org/3.0/library/codecs.html#standard-encodings
--
assignee: georg.brandl
components: Documentation, Library (Lib)
messages: 86933
nosy: ezio.melotti, georg.brandl
severity: normal
status: open
title: Stricter codec names
type: behavior
versions: Python 2.6, Python 2.7, Python 3.0, Python 3.1
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http://bugs.python.org/issue5902
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[issue1759169] clean up Solaris port and allow C99 extension modules
James Andrewartha tr...@ucc.gu.uwa.edu.au added the comment: I'm jhbuilding GNOME on Solaris, and the attached patch fixes the problem for me, having compiled Python with it I can now compile dbus-python, pycairo and pyorbit against it. -- nosy: +trs80 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1759169 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
