pyMpCCI v0.1
--- pyMpCCI v0.1 This package is a Python wrapper for MpCCI code-coupling product (see http://www.scai.fraunhofer.de/mpcci.html) MpCCI is a code-coupling system built on top of MPI. It insures data translation between structured meshes and unstructured meshes codes. For example when you build an application involving a structured mesh fluid solver (CFD) and an unstructured mesh structure solver (CSM). With this pyMpCCI module, your target application can be written in Python. It is useful for people using MpCCI and Python ;) --- Package pyMpCCI uses Numeric Python. The package is still incomplete and the doc is limited to the cover pages. If you want more info, including the package download, please go to: http://cgns-python.berlios.de/index.html -MP- --- Marc POINOT Alias: marcvsEmail: [EMAIL PROTECTED] ONERA -MFE/DSNA/ELSATel: 01.46.73.42.84 Info: [EMAIL PROTECTED] 29, Div. LeclercFax: 01.46.73.41.66 Site: 92322 Chatillon FRANCE Project: elsAWeb: http://www.onera.fr -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: *Python* Power Tools
On Tuesday 21 June 2005 06:53 pm, John Machin wrote: Micah wrote: Anyone know if there is any organized effort underway to implement the Python equivalent of Perl Power Tools http://ppt.perl.org/? If not, would starting this be a waste of effort since: +1 WOFTAM-of-the-year [...] Or would people really like to claim a pure Python set of UNIX utilities? Sorry, can't parse that last sentence. In other words, it'd be a purely aesthetic goal. Which is only a waste if art is. But then, I know *I'm* not going to spend time on it. ;-) -- Terry Hancock ( hancock at anansispaceworks.com ) Anansi Spaceworks http://www.anansispaceworks.com -- http://mail.python.org/mailman/listinfo/python-list
Re: tree functions daily exercise: Table
Dear Mr. Jones: Our team of 3,972 expert testers judged the output of your troll-spewing neural net virtually indistinguishable from the original. Given this, I am please to announce that our firm is willing to discuss arrangements for an exclusive license that you would likely find financially compelling. Please do not post the code on sourcefurge or whatever you call that open source thing until you speak with us. S. Ballmer -- http://mail.python.org/mailman/listinfo/python-list
Re: getting an object name
David Bear wrote:
Let's say I have a list called, alist. If I pass alist to a function,
how can I get the name of it?
alist = range(10)
def afunction(list):
listName = list.__name__ (fails for a list object)
You don't, see the other reply.
You didn't say why you think you need this for, but I suspect
that you can solve your case by using a dict in one way or another:
{ somename: [1,2,3,4,5] }
--Irmen
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Re: getting an object name
On 6/22/05, David Bear [EMAIL PROTECTED] wrote: Let's say I have a list called, alist. If I pass alist to a function, how can I get the name of it? The effbot put it beautifully: The same way as you get the name of that cat you found on your porch: the cat (object) itself cannot tell you its name, and it doesn't really care -- so the only way to find out what it's called is to ask all your neighbours (namespaces) if it's their cat (object) ... and don't be surprised if you'll find that it's known by many names, or no name at all! -- Cheers, Simon B, [EMAIL PROTECTED], http://www.brunningonline.net/simon/blog/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Using code objects?
Chinook wrote: When I create the code objects though, it seems a couple different ways work and I'm wondering which is better and why (or is there a more correct technique in this situation)? from where are you getting the source code for those code objects? from the example below, it sure looks like using callable objects and argument binding is a better way to do it. for the simplest cases, you can use a plain lambda to delay evaluation: The two different ways are illustrated below: Python 2.4.1 (#2, Mar 31 2005, 00:05:10) [GCC 3.3 20030304 (Apple Computer, Inc. build 1666)] Type help, copyright, credits or license for more information. def foo(st): ... print st ... obj1 = lambda: foo(#expression1#) obj1() #expression1# obj2 = lambda: foo(#expression2#) obj2() #expression2# /F -- http://mail.python.org/mailman/listinfo/python-list
Re: utf8 and ftplib
Fredrik Lundh wrote: character references refer to code points in the Unicode code space, so you just convert the bytes you get after converting to UTF-8. so you cannot just, of course. /F -- http://mail.python.org/mailman/listinfo/python-list
C++ ActiveX python javascript communication trouble.
I'm investingating a c++ api, Panda3d.com, that has a python binding. I want to convert this api into an ACtiveX control so it will run on the web. When I do so I want to use Microsoft Script Control to call api routines from Javascript in the browser. Let's say I write up a game in python with my own functions. Then I embed it in a web page and I want to call my functions from javascript? How can I do it. Script control allows you to bind api functions to javascript, but not the functions in my python file. Adobe Atmoshere a 3D application that ran in a web page, had a javascript binding. You could write code in a javascript file, and it would be interpreted during start-up. After that, I could send function calls in the form of a string from the browser to atmosphere. How did this work? Is the api aware of the python functions and variables after it is loaded up? Confused, Dan -- http://mail.python.org/mailman/listinfo/python-list
C++ ActiveX python javascript communication trouble.
I'm investingating a c++ api, Panda3d.com, that has a python binding. I want to convert this api into an ACtiveX control so it will run on the web. When I do so I want to use Microsoft Script Control to call api routines from Javascript in the browser. Let's say I write up a game in python with my own functions. Then I embed it in a web page and I want to call my functions from javascript? How can I do it. Script control allows you to bind api functions to javascript, but not the functions in my python file. Adobe Atmoshere a 3D application that ran in a web page, had a javascript binding. You could write code in a javascript file, and it would be interpreted during start-up. After that, I could send function calls in the form of a string from the browser to atmosphere. How did this work? Is the api aware of the python functions and variables after it is loaded up? Confused, Dan -- http://mail.python.org/mailman/listinfo/python-list
Reading registry export files
Hi,
I have exported some registry-keys using Regedit to a number of
.reg-files. I can open these files using any text editor. Now I wanted
to write a simple Python script to concatenate all these files to one
output file. (Please note that I'm a newbie).
However, if I do something like:
f=open('c:/documents and settings/myname/desktop/test.reg','r')
r=f.read()
print r
I get a lot of garbage with a lot characters which the Python shell
cannot display (it display a square instead). The above code does work
with ordinary text files.
Should I open these reg-files in a different way, or treat them
differently once read in Python?
Thanks for any help.
Kind regards, George
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Re: tree functions daily exercise: Table
Xah Lee wrote: oops, another error. The example should be: Table(f,[1,2,1],[2,6,2]) returns [[f(1,2),f(1,4),f(1,6)],[f(2,2),f(2,4),f(2,6)]] Wouldn't it be more sensible just to take the iterators directly as arguments, so for this example you would do: Table(f, range(1,3), range(2,7,2)) well yes... but this was emulation of Mathematica functions. (Disclaimer: Mathematica is a trademark of Wolfram Research Inc, who is not affliated with this project) What you suggested is a function called Outer in Mathematica. The Table function is in a sense multi-dimentional version of Range, so they share syntax form. Ok, so, if I understand you, the definition of Table is just: def Table(f, *lists): return Outer(f, *[range(start,end+1,step) for (start,end,step) in lists]) Is that about right? -- http://mail.python.org/mailman/listinfo/python-list
Re: Running WMI within a Windows service
Tim, Changing the path didn't do anything, but changing the name of the module to my_wmi did the trick. Thanks very much, Cam. Tim Golden wrote: [EMAIL PROTECTED] | Hi, | | When trying to import the WMI module in a Python Windows | Service, I get | the following: | | dynamic module does not define init function (initwmi) | | The WMI version is 0.6. Python 2.4 on Win32, Python Win32 extensions | version 203 This is almost certainly caused by a problem which I consistently fail to mention on my site every time it comes up. In essence, the service you've defined will run in c:\winnt\system32, where there is an file called wmi.dll (which presumably implements the core WMI functionality). Python, looking for a wmi to import, finds this -- which could be a Python module -- and tries to import it. And fails. Possible solutions: 1) Within the service code, switch directories to some other directory before importing wmi. 2) Rename wmi.py to something else (pywmi.py?) and import that. 3) Run the service as a named user, which will run within that user's home directory. (Not at all sure about this one; haven't tried it). HTH TJG This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: *Python* Power Tools
Micah wrote: Anyone know if there is any organized effort underway to implement the Python equivalent of Perl Power Tools http://ppt.perl.org/? If not, would starting this be a waste of effort since: - it's already being done in Perl? - cygwin thrives? - UNIX is already pervasive :-) ? Or would people really like to claim a pure Python set of UNIX utilities? There would be some use for a Python library that implements the functionality of these tools. Some of it already exists (difflib, shutil). Some is probably more difficult and less flexible to use from a lib that from straight python (cut). Perhaps that could be started either in the Python Cookbook (http://aspn.activestate.com/ASPN/Python/Cookbook/) or the Python Wiki (http://wiki.python.org/moin/). Just short explanations of how you would implement the functionality of various Unix utilities in Python. Daniel -- http://mail.python.org/mailman/listinfo/python-list
Re: tree functions daily exercise: Table
Duncan Booth wrote:
Ok, so, if I understand you, the definition of Table is just:
def Table(f, *lists):
return Outer(f,
*[range(start,end+1,step) for (start,end,step) in lists])
Is that about right?
And lest you think I left a bit too much as an exercise for the
reader:
-- xah.py
def Table(f, *lists):
Xah Lee's Table function
Table(f,[3,10,2])
[f(3), f(5), f(7), f(9)]
Table(f,[1,2,1],[2,6,2])
[[f(1, 2), f(1, 4), f(1, 6)], [f(2, 2), f(2, 4), f(2, 6)]]
return Outer(f, *[range(start,end+1,step) for (start,end,step) in lists])
def explode(lists):
Form all combinations of 1 element from each list.
explode([[1,2], [3]])
[(1, 3), (2, 3)]
explode([[1,2], [3,4]])
[(1, 3), (1, 4), (2, 3), (2, 4)]
explode([[1,2], [3,4], [5]])
[(1, 3, 5), (1, 4, 5), (2, 3, 5), (2, 4, 5)]
result = [()]
for l in lists[::-1]:
result = [ (val,) + tail for val in l for tail in result ]
return result
def groupsOfN(it, n):
Returns tuples of length n taken from it.
groupsOfN(range(12), 3)
[(0, 1, 2), (3, 4, 5), (6, 7, 8), (9, 10, 11)]
groupsOfN(range(12), 1)
[(0,), (1,), (2,), (3,), (4,), (5,), (6,), (7,), (8,), (9,), (10,), (11,)]
it = iter(it)
return zip(*([it]*n))
def Outer(f, *lists):
Outer(f, range(1,3), range(2,7,2))
[[f(1, 2), f(1, 4), f(1, 6)], [f(2, 2), f(2, 4), f(2, 6)]]
result = [f(*args) for args in explode(lists)]
for l in lists[:0:-1]:
result = [list(v) for v in groupsOfN(result, len(l))]
return result
def _test():
global f
class f:
def __init__(self, *args):
self.args = args
def __repr__(self):
if len(self.args) == 1:
return %s(%r) % (self.__class__.__name__.split('.')[-1],
self.args[0])
else:
return %s%r % (self.__class__.__name__.split('.')[-1],
self.args)
import doctest
doctest.testmod()
if __name__ == __main__:
_test()
--
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RE: Running WMI within a Windows service
[EMAIL PROTECTED] | [.. re problems running WMI in a service ...] | Changing the path didn't do anything, but changing the name of the | module to my_wmi did the trick. | | Thanks very much, | | Cam. | Thanks for the feedback; I'll try to find the time to experiment a bit but I know I've used the change-the-name trick in the past. It has been suggested that I permanently change the module name, but I'm a bit loth to do that. Mark (Hammond) was talking about a patch which would prevent imports from picking up the false .dll, but I don't know if it's gone anywhere. TJG This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: Loop until condition is true
Stelios == Stelios Xanthakis [EMAIL PROTECTED] writes: Stelios Anyway, if you can't wait for 2.5 either use 'while 1:', Stelios or pyc[1] ... and I can't see why people don't want to use 'while 1:' in the first place, given that everyone can identify the idiom immediately. It's 4 keystrokes less. -- Ville Vainio http://tinyurl.com/2prnb -- http://mail.python.org/mailman/listinfo/python-list
Re: Embedding Python - Deleting a class instance
On Tue, Jun 21, 2005 at 12:06:47PM +, Bue Krogh Vedel-Larsen wrote: How do I delete a class instance created using PyInstance_New? I've tried calling Py_CLEAR on the instance, but __del__ isn't called. I've also tried calling PyObject_Del, but this gives an access violation in _PyObject_DebugDumpAddress so I guess that ain't a good idea :) I've noticed that the PyObject returned by PyInstance_New has refcount = 2, does this have any significance? Well, the only way to do that is to call PyDECREF. And this is only legal when you really remove the reference, or else you get dangling pointers which will lead to a corrupted heap and/or segfault somewhere in the future of your program. Andreas -- http://mail.python.org/mailman/listinfo/python-list
Re: asynchronous comunication, wxPython and threads.
On Tue, 21 Jun 2005 11:07:35 -0400, Peter Hansen wrote: Please clarify: what does this mean? Sending a socket is not a usual way to describe TCP communications. Do you mean your program _opens_ a socket (like a phone connection) and _sends_ some data, then waits for data to be received from the other end? Or are you (as it almost sounds) opening and closing sockets repeatedly for each part of the conversation? Sorry for the lack of clarity. I opened the socket once (i don't know if itit is important to open inside or outside the comunication thread). And them send packages and wait for data. I think you are using the term socket where you should be using packet. A socket is the virtual connection created by TCP. A packet is either a single blob of data sent by the TCP code in the operating system, or perhaps a single chunk of your own data. Thanks for the vocabulary correction. If you are using a single TCP socket to send multiple packets, and you are talking about those packets being sent out of order, it's very unlikely and there must be another explanation. TCP _is_ reliable, and you will not get data out of order unless you do something to screw things up, for example by creating a race condition by doing multithreaded code incorrectly. I think this is the case (see the post of Toby). I didn't try it out but I think the problem is that i *do* comunication in both threads. Some people advise that, but there's really nothing *wrong* with doing this in a second thread, and in fact I do similar things all the time with no ill effects. While async frameworks _can_ make this easier, they could also make it harder (at least for a while) as you adjust your brain to the new approach. Furthermore, at least in the case of wxPython and Twisted (on Windows) there can be problems integrating the two loops. I don't believe the latest Twisted claims to have fully solved the problems involved yet, so you might still be required to have a second thread for the TCP stuff. Yes, i have read that there is problems yet. I use a non-blocking socket and select() calls in my thread, and communicate with the GUI thread using appropriate Queue objects and calls to PostEvent() (or CallAfter()) on the wx side of things. It's pretty straightforward, so if you post a small piece of your application which reproduces the problem it shouldn't be hard for someone here to help you fix it. Thanks. First i would check if the problem is what Toby says. No more so than using threads, unless your problem is caused by the threads themselves (as I suggested above) in which case it might be easier to just fix the problem. -Peter Thank you very much Zunbeltz -- http://mail.python.org/mailman/listinfo/python-list
Re: *Python* Power Tools
John == John Machin [EMAIL PROTECTED] writes: John For windows users, apart from cygwin, there are a couple of John sources of binaries for *x command-line utilities (unxutils, John gnuwin32). unxutils is my personal favourite - cygwin is way too much an environment, and gets broken too easily. I for one would like to see various shell tools implemented in pure python, if only to be able to import them as a module and use cross platform tools that have more power than e.g. 'shutil' or 'os' functions. The API exposed through the module (as opposed to normal execution from shell) could also be much richer, providing hooks for calling own stuff for just-in-time error handling, progress notification etc. So no, it doesn't seem like bad idea at all. It's also something that could evolve gradually, and reach a useful stage (i.e. have several handy tools) quickly. -- Ville Vainio http://tinyurl.com/2prnb -- http://mail.python.org/mailman/listinfo/python-list
Re: need to strip stuff off email
nephish [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] hey there, i have a script that retrieves my email, but i need it to be able to strip all the stuff off except the body (the message itself) so i can later write it to a text file. anyone know how to accomplish this? thanks The body is: The rest of the email after the first blank line after the subject header. In practice it is the first blank line. If you get the message into a string it can sometimes be easier to just RSPLIT the string at '\r\n\r\n', if the message is in a list then the body = '\r\n'.join(msg[x:]) where x = that blank line +1 , that way if you don't need any of the header info, you don't have to decode the message and rebuild it in a file. if you *are* using the email module, eg msg = email.message_from_file(a_file) then rsplit the msg to get the same result. As someone will no doubt point out, some emails are broken and parts of the headers will end up in the body (even when you view the email it in a client), this is very rare though. -- http://mail.python.org/mailman/listinfo/python-list
suggestions invited
hi all...i m a software engg. student completed my 2nd yr...i have been asked to make a project during these summer vacations...and hereby i would like to invite some ideas bout the design and implementation of an APPLICATION MONITORING SYSTEMi have to start from scrach so please tell me how to go bout it rite from the beggining this is the first time i m making a project of this complexity... i have to make a system used by the IT department of a company which contains 31 applications and their details which are being used in a company ...the details are... Application sub application catagoryplatform languageversion IT owner functional ownerremarks source code documentation last updated dates i want to design a system such that it lets the it employee enter the name of the application and gives him all the details about it...please suggest an appropriate design and the language which you think would be best to use...as i have enouf time with me and i can learn a new language as well...i currently know c and c++...your advise is welcomed Aditi -- http://mail.python.org/mailman/listinfo/python-list
Re: Want to learn a language - is Python right?
Hi Everyone, Thanks for all the helpful advice. Downloaded 2.4.1 and already have an inkling of some of the things it can do. Time to start learning! ATB Aziz -- http://mail.python.org/mailman/listinfo/python-list
Re: Loop until condition is true
On Wed, 22 Jun 2005 09:54:44 +0200, Fredrik Lundh wrote: [CENSORED] I keep for myself how stupid I found your post. so let's see if everyone who understands how embarrassingly stupid your post is will keep that to themselves... Damn, did I fail some test? wink -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Urgent: Embedding Python question please
Hi, I am embedding Python into a multi-threaded C++ application runnig on Solaris and need urgent clarification on the embedding architecture and its correct usage (as I am experience weird behaviors). Can anyone clarify: - if Python correctly supports multiple sub-interpreters (Py_NewInterpreter) ? - if Python correctly supports multiple thread states per sub-interpreter (PyThreadState_New) ? and the real question: - what is the rationale for choosing one of: [a] one sub-interpreter with many thread states [b] many sub-interpreters with one thread state each [c] many sub-interpreters with many threas states each Thanks for helping Alan -- http://mail.python.org/mailman/listinfo/python-list
Re: Installing MySQL-Python
Cathy Hui wrote: Do u know why do i get the following message error: command 'gcc' failed with exit status 1 yes: error: command 'gcc' failed with exit status 1 means: there's no compiler gcc ... kai when trying to build the MySql-Python (1.2.0) on my Solaris 8 system? (with mysql 4.0.21 and python 2.4). thanks! error mesg: ld: fatal: relocations remain against allocatable but non-writable sections collect2: ld returned 1 exit status error: command 'gcc' failed with exit status 1 see below for the log = # python setup.py build unknown 0x5c8 /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0x840 /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0x84c /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0x9b4 /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0x9bc /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0x9f8 /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0xa04 /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0xa98 /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0xaac /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0xad0 /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0xae0 /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) unknown 0xb0c /usr/local/mysql/lib/mysql/libmysqlclient_r.a(default.o) . . . ld: fatal: relocations remain against allocatable but non-writable sections collect2: ld returned 1 exit status error: command 'gcc' failed with exit status 1 -- http://mail.python.org/mailman/listinfo/python-list
Re: need to strip stuff off email
- Original Message - From: Tim Williams [EMAIL PROTECTED] To: python-list@python.org Sent: Wednesday, June 22, 2005 10:48 AM Subject: Re: need to strip stuff off email nephish [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] hey there, i have a script that retrieves my email, but i need it to be able to strip all the stuff off except the body (the message itself) so i can later write it to a text file. anyone know how to accomplish this? thanks The body is: The rest of the email after the first blank line after the subject header. In practice it is the first blank line. If you get the message into a string it can sometimes be easier to just RSPLIT the string at '\r\n\r\n', if the message is in a list then the body = '\r\n'.join(msg[x:]) where x = that blank line +1 , that way if you don't need any of the header info, you don't have to decode the message and rebuild it in a file. if you *are* using the email module, eg msg = email.message_from_file(a_file) then rsplit the msg to get the same result. As someone will no doubt point out, some emails are broken and parts of the headers will end up in the body (even when you view the email it in a client), this is very rare though. Ah, trying to do anything before my first cup of coffee in the morning is always a mistake - substitute RSPLIT with LSPLIT for both occurrences above !!! :( -- http://mail.python.org/mailman/listinfo/python-list
importing a package
Hi, I developed a package with a structure like this src/ tesfile.py dir1/ __init__.py file1.py dir2/ __init__.py file2.py The testfile is meant to try the code out that is specified in file1.py and file2.py Now i have another project where i want to use the code from that package. The structure of that project: src/ file3.py dir3/ __init__.py file4.py To use it, i copied the package in the root of the project: src/ file3.py dir3/ __init__.py file4.py package/ __init__.py dir1/ __init__.py file1.py dir2/ __init__.py file2.py In my code (file3.py) i then do an import package.dir1.file1 as myobj and access a class like this: myobj.LMyClass() (where myobj and LMyClass are decent names. Used these as example) That works but i get an error in the package files. I then get an error in package/dir1/file1.py on an import statement specified in that file1.py that says import dir2.file2 How come this works as standalone project and not when i try to use it as in situation 2 it doesn't seem to find module file2.py ? How can i solve that? Thanks Benedict -- http://mail.python.org/mailman/listinfo/python-list
Re: suggestions invited
On 22 Jun 2005 02:47:06 -0700, Aditi [EMAIL PROTECTED] wrote: i have to make a system used by the IT department of a company which contains 31 applications and their details which are being used in a company ...the details are... Application sub application catagoryplatform languageversion IT owner functional ownerremarks source code documentation last updated dates i want to design a system such that it lets the it employee enter the name of the application and gives him all the details about it...please suggest an appropriate design Ahem... Create a directory appmon. In this directory create a text file for each application. Put application details in file and name it after application name. Users will be able to view details of a particular application by using cat appname on unix or type appname on windows, thus it is a portable solution. I believe this design fits your requirements :) - kv -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting/Saving email attachments w/ poplib and email modules
- Original Message -
From: [EMAIL PROTECTED]
Here's what I'm trying to do:
I need to connect to a pop3 server, download all messages, and copy all
of the attachments into a specific directory. The actual email message
##
import email
import poplib
mimes = [image/tif,image/tiff,images/x-tif,image/x-tiff,
application/tif,application/tiff,application/x-tif,
application/x-tiff]
def WriteAttachment(msg):
for part in msg.walk():
if part.get_type() in mimes:
name = part.get_filename()
data = part.get_payload(decode=True)
f = file(name,'wb')
f.write(data)
f.close()
ms = poplib.POP3(server)
ms.user(user)
ms.pass_(passw)
msgcount = len(ms.list()[1])
for i in range(msgcount):
response, msg_as_list, size = ms.retr(i+1)
msg = email.message_from_string('\r\n'.join(msg_as_list))
WriteAttachment(msg)
##
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Re: Compiling C++ extensions with distutils on Cygwin
George Sakkis wrote: I'm trying to build a C++ extension on Cygwin, but it fails because distutils invokes gcc instead of g++. Looking into distutils internals, it turns out that compilation is assumed to be independent of the target language, while linking is not (CCompiler.compile() doesn't take a target_lang argument but CCompiler.link() does). Is there a good reason for this ? Is this a coincidence or what ? A patch for exactly this issue was posted just five days ago (http://python.org/sf/1222585), so it should be fixed in 2.5. George -- http://mail.python.org/mailman/listinfo/python-list
Re: getting an object name
On Wed, 22 Jun 2005 09:00:23 +0100, rumours say that Simon Brunning [EMAIL PROTECTED] might have written: Let's say I have a list called, alist. If I pass alist to a function, how can I get the name of it? The effbot put it beautifully: And IMO it should be in the FAQ: (http://www.python.org/doc/faq/general.html) How do I get the name of an object? The same way as you get the name of that cat you found on your porch: the cat (object) itself cannot tell you its name, and it doesn't really care -- so the only way to find out what it's called is to ask all your neighbours (namespaces) if it's their cat (object) ... and don't be surprised if you'll find that it's known by many names, or no name at all! Whom should we bug to add it? -- TZOTZIOY, I speak England very best. Be strict when sending and tolerant when receiving. (from RFC1958) I really should keep that in mind when talking with people, actually... -- http://mail.python.org/mailman/listinfo/python-list
Re: A World Beyond Capitalism 2005, An Annual International Multiracial Alliance Building Peace Conference Is Accepting Proposals...
Take your political propaganda somewhere else. DG -- http://mail.python.org/mailman/listinfo/python-list
Re: python create WMI instances
Create isn't a method of Win32_Printer so I couldn't get that to work. .Create is a method of Win32_Process which (wait for it..) creates a new process. Unfortunatly there is no method to add a printer. the method .AddPrinterConnection will allow me to add a connection to an existing print share but I want to create a printer with the option of sharing it. I think I'll have to do this with spawninstance. Tim Golden wrote: [Marc Wyburn] | | Hi all, I am struggling with a vb - python code conversion. I'm using | WMI to create printers on remote machines using (in VB); | | set oPrinter = oService.Get(Win32_Printer).SpawnInstance_ | | oPrinter.DriverName = strDriver | oPrinter.PortName = strPort | oPrinter.DeviceID = strPrinter | oPrinter.Put_(kFlagCreateOnly) | | In python I have logged onto the WMI service on the remote machine and | I can run things like c.new.AddPrinterConnection so I know that I am | connected and working OK. I don't get any errors when I create a new | object with SpawnInstance_ but when I try to set the value of | oPrinter.Drivername I get an error saying that the Drivername object | doesn't exist. Does anyone know how to set the values of the object | using either the method above or with the WMI module? I think the WMI | module only allows access to modify methods such ADDPrinterConnection | or Create (from Win32_Service). Not sure if I can help here or not, but just in case... As far as I understand you, the fact that you're creating on a remote machine is just an incidental, ie you'd have the same problem doing this locally. Part of the problem is that when VB does something like: oPrinter.DriverName = strDriver what's really happening behind the scenes is something like: oPrinter.Properties_ (DriverName).Value = strDriver Now you can do that in Python. (In fact, that's what the wmi module does when it overrides __setattr__, followed by a Put_). So if you want to translate code fairly literally, then carry on as you were, but substitute the latter code for the former. Having said that, the wmi module *can* create new instances of classes. The problem is that I had/have little knowledge of how WMI works in this area, so what I've done may not be right. The method you're looking for is .new (aliased as .new_instance_of) and if you use help on that method, you'll get this: new(self, wmi_class) unbound wmi.WMI method Create a new whatever, typically something like Win32_Process, eg: c = wmi.WMI (remote_machine) for p in c.Win32_Process (name=notepad.exe): print p c.new (Win32_Process).Create (CommandLine=notepad.exe) for p in c.Win32_Process (name=notepad.exe): print p p.Terminate () for p in c.Win32_Process (name=notepad.exe): print p Now this example works, but I notice from the code that what I did to make it work was to remove the SpawnInstance_ which I had, and replace it by an instance retrieval. ie I just do a Get on the class. I'll try to find some examples around of what you're doing which, up till now, I've not really needed to do. Meanwhile, I hope the above info is of some use. Feel free to respond with questions or comments. This can only get clearer! TJG This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting/Saving email attachments w/ poplib and email modules
[EMAIL PROTECTED] writes:
Hello All,
Here's what I'm trying to do:
I need to connect to a pop3 server, download all messages, and copy all
of the attachments into a specific directory. The actual email message
is unimportant. Now, I've found plenty of examples that strip the
attachments from an email message, but most (if not all) of them take a
file parameter. My question is this:
How can i retrieve an email message via poplib and pass it to
email.message_from_string()?
A quick look at the poplib documentation shows the retr method, which gets
a message by number, and returns a list: ['response', ['line', ...], octets].
So to get a string, you'd do:
from poplib import POP3
from sys import exit
p = POP3('example.com')
# authentication, etc.
msg_list = p.list()
if not msg_list.startswith('+OK'):
# Handle error in listings
exit(1)
for msg in msg_list[1]:
msg_num, _ = msg.split()
resp = p.retr(msg_num)
if resp.startswith('+OK'):
email.message_from_string('\n'.join(resp[1]))
else:
# Deal with error retrieving message.
This is untested code, but the details of dealing with poplib should
be right.
mike
--
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Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.
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ANN: python-ldap-2.0.8
Find a new release of python-ldap: http://python-ldap.sourceforge.net/ python-ldap provides an object-oriented API to access LDAP directory servers from Python programs. It mainly wraps the OpenLDAP 2.x libs for that purpose. Additionally it contains modules for other LDAP-related stuff (e.g. processing LDIF, LDAPURLs and LDAPv3 schema). Released 2.0.8 2005-06-22 at Linuxtag 2005, Karlsruhe, Germany Changes since 2.0.7: * Preliminary support for receiving LDAP controls added. Contributor: - Andreas Ames Lib:/ - Added classes in module ldif to ldif.__all__ to fix from ldif import * - Removed BitString syntax from ldap.schema.models.NOT_HUMAN_READABLE_LDAP_SYNTAXES since the LDAP encoding is in fact human-readable - ldapurl.LDAPUrlExtension.unparse() outputs empty string if LDAPUrlExtension.exvalue is None - Added ldap.controls.SimplePagedResultsControl Released 2.0.7 2005-04-29 Changes since 2.0.6: * Added preliminary support for sending LDAP controls with a request. Contributors: - Deepak Giridharagopal - Ingo Steuwer (Receiving controls in LDAP results still not supported.) Modules: * LDAPObject.c: removed l_ldap_manage_dsa_it() * LDAPObject.c: Added missing #ifdef around l_ldap_passwd() for compability with older OpenLDAP libs. Lib:/ * New algorithm in ldap.schema.tokenizer.split_tokens() contributed by Wido Depping which is more robust when parsing very broken schema elements (e.g. Oracle's OID). * Fixed argument list (position of timeout) when calling LDAPObject.search_ext_s() from search_st() and search_s(). * LDAPObject.search_ext_s() correctly calls search_ext_s() now. * Re-implemented LDAPObject.manage_dsa_it() without calling _ldap. -- http://mail.python.org/mailman/listinfo/python-list
Re: Loop until condition is true
A bit off topic, but what does the expression Don't try to teach your grandfather how to suck eggs. mean? I've never heard it before and am curious to the story behind it. Thanks, --greg -- http://mail.python.org/mailman/listinfo/python-list
Re: Reading registry export files
It works fine for me on NT. I think it has nothing to do with Python but with the way the file is created - what windows version are you on? Also note the possibility the '/' - I prefer a noatation like below to avoid ambiguity. Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. py f = open(rd:\test.reg) py r = f.read() py print r REGEDIT4 I would do it like this however, then join all lists from various .reg files: py f = open(r'd:\test.reg') py r = f.readlines() py print r ['REGEDIT4\n', '\n', '[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Ole]\n', 'Enabl eDCOM=Y\n', 'DefaultLaunchPermission=hex:01,00,04,80,64,00,00,00,80,00,00,0 0,00,00,00,00,\\\n', ' 14,00,00,00,02,00,50,00,03,00,00,00,00,00,18,00,01,00,00 ,00,01,01,00,00,00,\\\n', ' 00,00,05,12,00,00,00,00,00,00,00,00,00,18,00,01,00, 00,00,01,01,00,00,00,00,\\\n', ' 00,05,04,00,00,00,00,00,00,00,00,00,18,00,01,0 0,00,00,01,02,00,00,00,00,00,\\\n', ' 05,20,00,00,00,20,02,00,00,01,05,00,00,00 ,00,00,05,15,00,00,00,a0,5f,84,1f,\\\n', ' 5e,2e,6b,49,ce,12,03,03,f4,01,00,00, 01,05,00,00,00,00,00,05,15,00,00,00,a0,\\\n', ' 5f,84,1f,5e,2e,6b,49,ce,12,03,0 3,f4,01,00,00\n', '\n'] [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole] EnableDCOM=Y DefaultLaunchPermission=hex:01,00,04,80,64,00,00,00,80,00,00,00,00,00,00,00, 14,00,00,00,02,00,50,00,03,00,00,00,00,00,18,00,01,00,00,00,01,01,00,00,00,\ 00,00,05,12,00,00,00,00,00,00,00,00,00,18,00,01,00,00,00,01,01,00,00,00,00,\ 00,05,04,00,00,00,00,00,00,00,00,00,18,00,01,00,00,00,01,02,00,00,00,00,00,\ 05,20,00,00,00,20,02,00,00,01,05,00,00,00,00,00,05,15,00,00,00,a0,5f,84,1f,\ 5e,2e,6b,49,ce,12,03,03,f4,01,00,00,01,05,00,00,00,00,00,05,15,00,00,00,a0,\ 5f,84,1f,5e,2e,6b,49,ce,12,03,03,f4,01,00,00 -- http://mail.python.org/mailman/listinfo/python-list
Re: Loop until condition is true
- Original Message - From: Greg Lindstrom [EMAIL PROTECTED] A bit off topic, but what does the expression Don't try to teach your grandfather how to suck eggs. mean? I've never heard it before and am curious to the story behind it. A relatively well know phrase, however as quoted it is incorrect, it should have referred to grandmother http://www.phrases.org.uk/bulletin_board/18/messages/50.html http://www.worldwidewords.org/qa/qa-tea1.htm :) -- http://mail.python.org/mailman/listinfo/python-list
Re: A World Beyond Capitalism 2005, An Annual International Multiracial Alliance Building Peace Conference Is Accepting Proposals...
Jack Diederich wrote: The '.info' domain also defeats the linux 'whois' command to dig for registrar info. Maybe so, but it's always pretty easy to Google for whois plus the domain to find a way of doing it via the web, in this case with http://www.afilias.info/cgi-bin/whois.cgi . (It's registered to something called the Institute of Pamela, which seems to stand for Peaceful Alliances facilitated by Multilingual, multiracial Education, handicapable outreach and native Language Accessibility. I think this thing really exists, making this spam and not just a farce.) -Peter -- http://mail.python.org/mailman/listinfo/python-list
Python API to manipulate CAB files.
Does anyone know of a Python API to manipulate CAB files? Thanks, -- Isaac Rodriguez SWE Autodesk. There are 10 types of people. Those who undertand binary, and those who don't -- http://mail.python.org/mailman/listinfo/python-list
Re: Reading registry export files
* [EMAIL PROTECTED] (2005-06-22 13:59 +0100) It works fine for me on NT. I think it has nothing to do with Python but with the way the file is created - what windows version are you on? Windows uses UTF-16 since Windows 2000. Regedit offers the possibility to export in the old Win9x/NT4 format. -- http://mail.python.org/mailman/listinfo/python-list
Re: C++ ActiveX python javascript communication trouble.
I'm investingating a c++ api, Panda3d.com, that has a python binding. I want to convert this api into an ACtiveX control so it will run on the web. When I do so I want to use Microsoft Script Control to call api routines from Javascript in the browser. Let's say I write up a game in python with my own functions. Then I embed it in a web page and I want to call my functions from javascript? How can I do it. Script control allows you to bind api functions to javascript, but not the functions in my python file. Adobe Atmoshere a 3D application that ran in a web page, had a javascript binding. You could write code in a javascript file, and it would be interpreted during start-up. After that, I could send function calls in the form of a string from the browser to atmosphere. How did this work? Is the api aware of the python functions and variables after it is loaded up? Confused, Dan So what's your question about the C++ language. ActiveX, Javascript, phython, web stuff are off topic. -- http://mail.python.org/mailman/listinfo/python-list
Re: sudoku dictionary attack
Nick Atty wrote: On-line canal route planner: http://www.canalplan.org.uk So the Travelling Salesman goes by narrow boat these days, does he? Nigel -- ScriptMaster language resources (Chinese/Modern Classical Greek/IPA/Persian/Russian/Turkish): http://www.elgin.free-online.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Database recommendations for Windows app
Hi,
I'd like to write a windows app that accesses a locally stored database.
There are a number of tables, the largest of which has 455,905 records.
Can anyone recommend a database that runs on Windows, is fast /
efficient and can be shipped without restrictions or extra downloads?
I have googled and found plenty of information on databases, its just
that I dont have enough experience with databases to know which one is
best for my task!
Thanks in advance,
Will McGugan
--
http://www.willmcgugan.com
.join({'*':'@','^':'.'}.get(c,0) or chr(97+(ord(c)-84)%26) for c in
jvyy*jvyyzpthtna^pbz)
--
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Re: getting an object name
David Bear wrote: Let's say I have a list called, alist. If I pass alist to a function, how can I get the name of it? alist = range(10) def afunction(list): listName = list.__name__ (fails for a list object) Using an object's name as data isn't a good idea because it will generally cause more problems than it solves. If you have several different types of lists and need to handle them differently, then you might consider using class's that knows how to handle each type of list. Also, if the name is really part of the data, then you should store the name as a string with the list. class data1(object): def __init__(self, alist, name): self.list = alist self.name = name def data_type(self): print This is a data1 object class data2(object): def __init__(self, alist, name): self.list = alist self.name = name def data_type(self): print This is a data2 object list_a = data1( range(10), small list) print list_a.list print list_a.name list_b = data2( range(100), large list) def data_type(data): data.data_type() # don't need the name here data_type(list_a) # prints 'This is a data1 object' data_type(list_b) # prints 'This is a data2 object' You can also store a name with the list in a list if you don't want to use class's. alist = ['mylist',range[10]] print alist[0] # name print alist[1] # list Regards, Ron -- http://mail.python.org/mailman/listinfo/python-list
[no subject]
Is there a good IDE for Python? I have heard that Eclipse has a plugin for Jython only. Thanks --Doug -- http://mail.python.org/mailman/listinfo/python-list
Re: Loop until condition is true
Remi Villatel wrote: Erm... You totally missed the point. I wrote it this way because, first, it's perfectly valid Python code and, second and most important, it's also a valid english sentence. Remi, I think you have failed to understand what Fredrik was telling you. I can understand that, because he didn't actually explain the problem. He probably thought it was obvious, but it seems it wasn't. if a is b: is equivalent to if id(a) == id(b). It doesn't test whether two values are the equal, it tests whether a and b are the same object. None is a singleton object in Python, but True is not. (At least not in the Python versions I use.) That means that you are relying on Python to use a performance optimization (interning of some common values, in this case the integer 1, which is what True is in practice). In some cases, == and is happens to give the same result. a = 1 b = 1 a == b 1 a is b 1 But often not. c = 123456789 d = 123456789 c == d 1 c is d 0 Or, for an example of the opposite: class Smaller: ... def __cmp__(self, other): ... return -1 ... s = Smaller() b = a a b 1 b a 1 a == b 0 a is b 1 In other words, a test like if x is None: makes sense, since None is a singleton, but if x is True: certainly seems like buggy code that just happens to work. You could write if x == True: without risking a failure in some Python implementation that doesn't intern True (i.e. 1) if you are certain that x is 0 or 1, but it's completely redundant. Why stop there? Why not write if x == True == True: or if x == True == True == True:? These are all logically equivalent. You could also write if x and True:, or if x or not True :) I understand what your intentions are: You feel that your code is easier to understand written the way you did it, but it stops feeling like that once you have gotten fully into your head that the expressions (a) and (a == True) are logically equivalent if a is either True or False. If you manage to get away from this x == True mind-set you are likely to write better Python code. First of all, a lot of Python values except 1 (a.k.a. True) are logically true in a Python expression. It's considered good form to exploit that. E.g. if y: z = x / y if text: print text if l: cols = len(l[0]) In these cases, adding a ==True, would break the code, and adding more correct comparisions would just clutter the code, which hides the intent and raises the risk for bugs, and make it more difficult to keep the code as flexible as Python code can be. E.g. if you change the last statement to if l != []: cols = len(l[0]), you'll get in trouble if it turns out that l = (). The uncluttered code will still work. Secondly, if you ever write logical expressions that are more complex, you will make them much more difficult to read unless you drop that == True baggage. I'm convinced that it's easier to understand if past_six or past_three and saturday or sunday: than to understand if (past_six==True or past_three==True and saturday==True or sunday==True): I'm also pretty sure it's easier to write the first without making any mistake. -- http://mail.python.org/mailman/listinfo/python-list
Re: asynchronous comunication, wxPython and threads.
On Wed, 22 Jun 2005 09:28:31 -0400, Peter Hansen wrote: Almost certainly it is. It would be simplest to set up a worker thread once, when the GUI thread begins, and simply send requests to it via a Queue. It can create the socket, connect to the server, communicate, close it down, and go back to waiting all in one place (so to speak... of course this would be several methods all called from a top-level loop in that thread). No chance of mis-steps. I corrected the problem. A bit of the comunication was done in the GUI thread. Thanks again for your help. Zunbeltz -- http://mail.python.org/mailman/listinfo/python-list
Re: Database recommendations for Windows app
Will McGugan [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, I'd like to write a windows app that accesses a locally stored database. There are a number of tables, the largest of which has 455,905 records. Can anyone recommend a database that runs on Windows, is fast / efficient and can be shipped without restrictions or extra downloads? I have googled and found plenty of information on databases, its just that I dont have enough experience with databases to know which one is best for my task! If you are writing strictly for the MS Windows platform And If the database is running single user with a locally stored database on a Windows workstation. Then The MS Access file based (.mdb) system is hard to argue with. You wouldn't have to distribute the (rather expensive) Access application since this is little more than a front for the underlying DAO/ADO database libraries that are built into the warp and woof of MS Windows. Your Python application can address the DAO or ADO directly as these will libraries will be pre-installed and/or freely available for MS Windows. Fast, freely available, no license restrictions, and no need for extra downloads for a reasonably recent (Win2000, XP) operating system. On the other hand, if operating system portability were a concern (as it should be!), I might suggest MySQL. A Python/MySQL application can jump between Windows to Linux (all flavors!) to Unix to BSD without need to alter a single line of code. You were writing a Python app, weren't you :-) Thomas Bartkus -- http://mail.python.org/mailman/listinfo/python-list
Re: importing a package
Damjan wrote:
I developed a package with a structure like this
src/
tesfile.py
dir1/
__init__.py
file1.py
dir2/
__init__.py
file2.py
Importing dir2/file2 from dir1/file1.py works here, because when yuo started
the testfile script the src/ directory was added to the sys.path list.
If you relocate dir1/ and dir2/ in a package directory here it will not
work.
Indeed, when i do this, then it works
import sys
sys.path.append('package')
However, why is it that package isn't added automatically to the pad?
Regards,
Benedict
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Re: Database recommendations for Windows app
I always figured a problem with using MySQL was distribution. Would you have to tell your users to install MySQL and then to leave the service running? I've never found an easy way to embed MySQL into a python app, and even if you could, would you then have to pay for it? -Greg On 6/22/05, Thomas Bartkus [EMAIL PROTECTED] wrote: Will McGugan [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, I'd like to write a windows app that accesses a locally stored database. There are a number of tables, the largest of which has 455,905 records. Can anyone recommend a database that runs on Windows, is fast / efficient and can be shipped without restrictions or extra downloads? I have googled and found plenty of information on databases, its just that I dont have enough experience with databases to know which one is best for my task! If you are writing strictly for the MS Windows platform And If the database is running single user with a locally stored database on a Windows workstation. Then The MS Access file based (.mdb) system is hard to argue with. You wouldn't have to distribute the (rather expensive) Access application since this is little more than a front for the underlying DAO/ADO database libraries that are built into the warp and woof of MS Windows. Your Python application can address the DAO or ADO directly as these will libraries will be pre-installed and/or freely available for MS Windows. Fast, freely available, no license restrictions, and no need for extra downloads for a reasonably recent (Win2000, XP) operating system. On the other hand, if operating system portability were a concern (as it should be!), I might suggest MySQL. A Python/MySQL application can jump between Windows to Linux (all flavors!) to Unix to BSD without need to alter a single line of code. You were writing a Python app, weren't you :-) Thomas Bartkus -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: python create WMI instances
Win32_Printer doesn't work with the Create method and AddPrinterConnection only lets me add a connection to a share. I'll try and work out how to set the printer object properties in the format suggested; oPrinter.Properties_ (DriverName).Value = strDriver Cheers, MW. -- http://mail.python.org/mailman/listinfo/python-list
RE: python create WMI instances
[EMAIL PROTECTED] | Win32_Printer doesn't work with the Create method and | AddPrinterConnection only lets me add a connection to a share. I'll | try and work out how to set the printer object properties in | the format | suggested; | | oPrinter.Properties_ (DriverName).Value = strDriver | | Cheers, MW. I'm sorry my module won't have been much use to you in this, but it would be *really* helpful if you could post [a fragment of] the code you come up with so I can see what changes I need to make to help our future instance-spawners. It's just that I've never had the need to do this, and don't have any time to experiment at present. Thanks TJG This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: Database recommendations for Windows app
Take a look at Firebird. It can be run in embedded mode. It might be overkill for your needs though... On 6/22/2005 10:37 AM, Gregory Piñero wrote: I always figured a problem with using MySQL was distribution. Would you have to tell your users to install MySQL and then to leave the service running? I've never found an easy way to embed MySQL into a python app, and even if you could, would you then have to pay for it? -Greg On 6/22/05, Thomas Bartkus [EMAIL PROTECTED] wrote: Will McGugan [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, I'd like to write a windows app that accesses a locally stored database. There are a number of tables, the largest of which has 455,905 records. Can anyone recommend a database that runs on Windows, is fast / efficient and can be shipped without restrictions or extra downloads? I have googled and found plenty of information on databases, its just that I dont have enough experience with databases to know which one is best for my task! If you are writing strictly for the MS Windows platform And If the database is running single user with a locally stored database on a Windows workstation. Then The MS Access file based (.mdb) system is hard to argue with. You wouldn't have to distribute the (rather expensive) Access application since this is little more than a front for the underlying DAO/ADO database libraries that are built into the warp and woof of MS Windows. Your Python application can address the DAO or ADO directly as these will libraries will be pre-installed and/or freely available for MS Windows. Fast, freely available, no license restrictions, and no need for extra downloads for a reasonably recent (Win2000, XP) operating system. On the other hand, if operating system portability were a concern (as it should be!), I might suggest MySQL. A Python/MySQL application can jump between Windows to Linux (all flavors!) to Unix to BSD without need to alter a single line of code. You were writing a Python app, weren't you :-) Thomas Bartkus -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Database recommendations for Windows app
On 2005-06-22, Will McGugan [EMAIL PROTECTED] wrote: I'd like to write a windows app that accesses a locally stored database. There are a number of tables, the largest of which has 455,905 records. Can anyone recommend a database that runs on Windows, is fast / efficient and can be shipped without restrictions or extra downloads? http://pysqlite.org Dave Cook -- http://mail.python.org/mailman/listinfo/python-list
PEP ? os.listdir enhancement
Hi, I noticed that when I use os.listdir I need to work with absolute paths 90% of times. While I can use a for cycle, I'd prefere to use a list comprehension, but it becomes too long. I propose to add an 'abs' keyword which would make os.listdir return the absolute path of files instead of a relative path. This would bring only advantages, I think. I show two examples from os import listdir from os.path import isdir,join,getsize,isfile ### e.g. 1 part 1 - getting a list of directories ### dirs=[] for i in os.listdir(path): tmp_path=os.path.join(path,i) if os.path.isdir(tmp_path): dirs.append(tmp_path) ### e.g. 1 part 2 ### dirs=[join(path,x) for x in listdir(path) if isdir(join(path,x))] here the list comprehension is still clear, but only because we have direct references to join and friends. moreover whe need to use join twice for each directory. ### e.g. 2 part 1 - getting a list of (file,size) tuples ### path_size=[] for i in os.listdir(path): tmp_path=os.path.join(path,i) if os.path.isfile(tmp_path): path_size.append((tmp_path,getsize(tmp_path)) ### e.g. 2 part 2 ### dirs=[(join(path,x),getsize(join(path,x)) for x in listdir(path) if isfile(join(path,x))] now list comprehension is way too long, and in the worst case we must use join 3 times for each iteration. adding an 'abs' keyword to os.listdir would give benefits both to for cycle and list comprehensions. for cycle would lose the tmp_path assignment and list comprehensions ... ### e.g. 1 part 2 bis ### dirs=[x for x in listdir(path,abs=True) if isdir(x)] here we gain clearness and speed. ### e.g. 2 part 2 bis ### dirs=[(x,getsize(x)) for x in listdir(path,abs=True) if isfile(x)] and here we gain clearness, speed and a truely _usable_ list comprehension What do you think about this ? Thanks for reading, Riccardo -- Riccardo Galli Sideralis Programs http://www.sideralis.net -- http://mail.python.org/mailman/listinfo/python-list
Re: Loop until condition is true
Remi Villatel wrote: Fredrik Lundh wrote: checking if a logical expression is true by comparing it to True is bad style, and comparing values using is is also bad style. I wrote it this way because, first, it's perfectly valid Python code and, second and most important, it's also a valid english sentence. As others have pointed out, it's not perfectly valid code. In fact it is frequently incorrect. [CENSORED] I keep for myself how stupid I found your post... Don't try to teach your grandfather how to suck eggs. You apparently don't know how to do it without getting egg on your face. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Looking for a web-based messaging system
One of my clients has a need for a web-based messaging system. Something python-based is preferred, as that's where our expertise is, but web frameworks built in Python are perfectly acceptable. If you know of something really good that isn't in Python, I wouldn't mind hearing about it - but I do have a long list of non-python solutions. I've got a pretty full set of requirements. Basically, the user should log in to the web site and get a list of outstanding messages. It *has* to support multiple browser windows with different views of the list. Capabilities wanted include sorting in both directions and on multiple fields. Filtering based on arbitrary fields - including both ANDing and ORing together filtering criteria. It should be possible to group related messages together, with a single line display summarizing the group. Likewise, it should be possible to fold related messages into a single line, and unfold specific instances. We'd like the messages to be stored in an SQL database - we're using postgres - so we can use our existing report generation tools. The only licensing requirement is that we get source so we can tailor the product to our needs. Commercial is perfectly fine. GPL is acceptable, but not preferred. So far, the only thing I've found that comes remotely close to this is BoBoMail. Thanks, mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
Re: Database recommendations for Windows app
Will McGugan wrote: Hi, I'd like to write a windows app that accesses a locally stored database. There are a number of tables, the largest of which has 455,905 records. Can anyone recommend a database that runs on Windows, is fast / efficient and can be shipped without restrictions or extra downloads? I have googled and found plenty of information on databases, its just that I dont have enough experience with databases to know which one is best for my task! Neither do we, considering that brief description. Will there be multiple simultaneous users? Multiple simultaneous writers? Do you require proper transaction management? (Or is it a pure read-only database, since you know exactly how many records the largest table has?) Do you need to make ad-hoc queries? What will your code look like? * Is it object-oriented? * Are there a lot of fixed relations between objects? Are there other requirements such as need for undo or change history management? Does the application work with small chunks of data at a time (such as in a ticket ordering system) or with larger chunks (such as in a web site CMS)? What size is it? It's a big difference between 455,905 integers and 455,905 mp3 files for instance... A number of tables tells us very little, more than suggesting that it's more than one... Ten and 200 makes a big difference. -- http://mail.python.org/mailman/listinfo/python-list
Re: Database recommendations for Windows app
Thomas Bartkus wrote: If you are writing strictly for the MS Windows platform And If the database is running single user with a locally stored database on a Windows workstation. Then The MS Access file based (.mdb) system is hard to argue with. I disagree. What does .mdb/jet without Access offer you that you don't get from e.g. SQLite except vendor lock-in and horrible deviations from the SQL standard? Ok, it does give you somewhat stronger typing, which you might possibly want, but if that's an issue, I'd suggest embedded firebird (if we want serverless). I'm not entirely sure something SQLish is the way to go though. Also, the best ODBC adaper for Python, mxODBC, isn't free. Last time I used adodbapi, it was a bit buggy, and pure ADO or DAO solutions don't follow the Python standard DB-API 2. -- http://mail.python.org/mailman/listinfo/python-list
Dr. Dobb's Python-URL! - weekly Python news and links (Jun 22)
QOTW: Python is more concerned with making it easy to write good programs than difficult to write bad ones. - Steve Holden Scientists build so that they can learn. Programmers and engineers learn so that they can build. - Magnus Lycka It happens that old Java programmers make one module per class when they start using Python. That's more or less equivalent of never using more than 8.3 characters in filenames in modern operating systems, or to make a detour on your way to work because there used to be a fence blocking the shortest way a long time ago. - Magnus Lycka Python doesn't currently have a case or switch statement. Case blocks are easily simulated with if, elif, and else, but would Python's readability benefit from having it built in?: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/29e45afc78adcd15 A Podcast worth listening to at last. Guido speaks on Python's history and community: http://www.itconversations.com/shows/detail545.html http://www.itconversations.com/shows/detail559.html If your class implements __eq__ but not __ne__, (a = b) does not imply !(a != b). If this something that should be fixed, or just a gotcha? http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/f6e0986b2c0f01c0 John Machin instructively analyzes several of Excel's defects as a data-management vehicle, obliquely highlighting Python's Zen. Tim Roberts follows up with a small but potentially crucial addendum pertinent, among others, to those who deal with USA zip codes: http://groups-beta.google.com/group/comp.lang.python/index/browse_frm/thread/d14b13c8bc6e8515/ Recent (unreleased) work on distutils allows you to automatically upload packages to PyPI: http://www.amk.ca/diary/archives/003937.html Text files and line endings; Python helps you out on Windows, which can be a little confusing: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/2d3f61b949bca0e9 Kalle wants to protect his instance attributes. He's warned off the idea, but at the same time, alex23 demonstrates an interesting way of doing it using properties(): http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/9f7c29fed95d7586 Creating a Python iterator by wrapping any callable: http://bob.pythonmac.org/archives/2005/06/14/python-iterators-and-sentinel-values/ Richard Lewis wants resumable exceptions. Python doesn't have them, but Peter Hansen shows him how to achieve what he wants, and Willem shows us how resumable exceptions work in Lisp: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/e3dafce228dd4258 Jan Danielsson is confused about the difference between __str__ and __repr__, and what they are both for: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/b37f1e3fae1154d6 The Kamaelia Framework; communicating with and linking Python generators: http://www.bbc.co.uk/rd/pubs/whp/whp113.shtml Ron Adams proposes an also block to be executed if a for loop's else block isn't, and more controversially, that the else block's meaning be switched: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/b15de260c5ca02e0 How you convince your marketing drones that switching from Python to Java would be A Bad Thing? http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/5b6d1ff54640e9b1 Why should an ambitious 14-year-old look at Python? (And why source-code hiding is a waste of time.) http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/107a4da1dd45b915 Everything Python-related you want is probably one or two clicks away in these pages: Python.org's Python Language Website is the traditional center of Pythonia http://www.python.org Notice especially the master FAQ http://www.python.org/doc/FAQ.html PythonWare complements the digest you're reading with the marvelous daily python url http://www.pythonware.com/daily Mygale is a news-gathering webcrawler that specializes in (new) World-Wide Web articles related to Python. http://www.awaretek.com/nowak/mygale.html While cosmetically similar, Mygale and the Daily Python-URL are utterly different in their technologies and generally in their results. For far, FAR more Python reading than any one mind should absorb, much of it quite interesting, several pages index much of the universe of Pybloggers. http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog http://www.planetpython.org/
Dr. Dobb's Python-URL! - weekly Python news and links (Jun 22)
QOTW: Python is more concerned with making it easy to write good programs than difficult to write bad ones. - Steve Holden Scientists build so that they can learn. Programmers and engineers learn so that they can build. - Magnus Lycka It happens that old Java programmers make one module per class when they start using Python. That's more or less equivalent of never using more than 8.3 characters in filenames in modern operating systems, or to make a detour on your way to work because there used to be a fence blocking the shortest way a long time ago. - Magnus Lycka Python doesn't currently have a case or switch statement. Case blocks are easily simulated with if, elif, and else, but would Python's readability benefit from having it built in?: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/29e45afc78adcd15 A Podcast worth listening to at last. Guido speaks on Python's history and community: http://www.itconversations.com/shows/detail545.html http://www.itconversations.com/shows/detail559.html If your class implements __eq__ but not __ne__, (a = b) does not imply !(a != b). If this something that should be fixed, or just a gotcha? http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/f6e0986b2c0f01c0 John Machin instructively analyzes several of Excel's defects as a data-management vehicle, obliquely highlighting Python's Zen. Tim Roberts follows up with a small but potentially crucial addendum pertinent, among others, to those who deal with USA zip codes: http://groups-beta.google.com/group/comp.lang.python/index/browse_frm/thread/d14b13c8bc6e8515/ Recent (unreleased) work on distutils allows you to automatically upload packages to PyPI: http://www.amk.ca/diary/archives/003937.html Text files and line endings; Python helps you out on Windows, which can be a little confusing: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/2d3f61b949bca0e9 Kalle wants to protect his instance attributes. He's warned off the idea, but at the same time, alex23 demonstrates an interesting way of doing it using properties(): http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/9f7c29fed95d7586 Creating a Python iterator by wrapping any callable: http://bob.pythonmac.org/archives/2005/06/14/python-iterators-and-sentinel-values/ Richard Lewis wants resumable exceptions. Python doesn't have them, but Peter Hansen shows him how to achieve what he wants, and Willem shows us how resumable exceptions work in Lisp: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/e3dafce228dd4258 Jan Danielsson is confused about the difference between __str__ and __repr__, and what they are both for: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/b37f1e3fae1154d6 The Kamaelia Framework; communicating with and linking Python generators: http://www.bbc.co.uk/rd/pubs/whp/whp113.shtml Ron Adams proposes an also block to be executed if a for loop's else block isn't, and more controversially, that the else block's meaning be switched: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/b15de260c5ca02e0 How you convince your marketing drones that switching from Python to Java would be A Bad Thing? http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/5b6d1ff54640e9b1 Why should an ambitious 14-year-old look at Python? (And why source-code hiding is a waste of time.) http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/107a4da1dd45b915 Everything Python-related you want is probably one or two clicks away in these pages: Python.org's Python Language Website is the traditional center of Pythonia http://www.python.org Notice especially the master FAQ http://www.python.org/doc/FAQ.html PythonWare complements the digest you're reading with the marvelous daily python url http://www.pythonware.com/daily Mygale is a news-gathering webcrawler that specializes in (new) World-Wide Web articles related to Python. http://www.awaretek.com/nowak/mygale.html While cosmetically similar, Mygale and the Daily Python-URL are utterly different in their technologies and generally in their results. For far, FAR more Python reading than any one mind should absorb, much of it quite interesting, several pages index much of the universe of Pybloggers. http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog http://www.planetpython.org/
Re: Python API to manipulate CAB files.
Isaac Rodriguez schrieb:
Does anyone know of a Python API to manipulate CAB files?
If there is a Windows API you can probybly call it from Python
using Mark Hammond's Win32 extensions.
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Re: PEP ? os.listdir enhancement
Why not just define the function yourself? Not every 3-line function needs to be built in. def listdir_joined(path): return [os.path.join(path, entry) for entry in os.listdir(path)] dirs = [x for x in listdir_joined(path) if os.path.isdir(x)] path_size = [(x, getsize(x)) for x in listdir_joined(path) if os.path.isfile(x)] Jeff pgpwXvnkgy6r4.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: a comprehensive Tkinter document?
Kent Johnson wrote: William Gill wrote: I know a major problem I am having is that I am finding lots of Tkinter information in 'fragments' of various , sometimes conflicting vintages. For example the python reference I was using didn't show the '%%' as an escape sequence, I posted asking how to escape the '%' and after several helpful responses voila I found a more complete table of escape sequences. Is there a comprehensive document or book that I can get that is relatively current? Maybe not comprehensive but I think reasonably current: http://www.pythonware.com/library/tkinter/introduction/index.htm http://infohost.nmt.edu/tcc/help/pubs/tkinter/ Kent Yes, these are two of my staples, though I have occasionally slipped into 'copies' elsewhere that aren't kept up. Thanks, Bill -- http://mail.python.org/mailman/listinfo/python-list
Re: Database recommendations for Windows app
Will McGugan [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, I'd like to write a windows app that accesses a locally stored database. There are a number of tables, the largest of which has 455,905 records. Can anyone recommend a database that runs on Windows, is fast / efficient and can be shipped without restrictions or extra downloads? I have googled and found plenty of information on databases, its just that I dont have enough experience with databases to know which one is best for my task! If you are writing strictly for the MS Windows platform And If the database is running single user with a locally stored database on a Windows workstation. Then The MS Access file based (.mdb) system is hard to argue with. You wouldn't have to distribute the (rather expensive) Access application since this is little more than a front for the underlying DAO/ADO database libraries that are built into the warp and woof of MS Windows. Your Python application can address the DAO or ADO directly as these will libraries will be pre-installed and/or freely available for MS Windows. Fast, freely available, no license restrictions, and no need for extra downloads for a reasonably recent (Win2000, XP) operating system. On the other hand, if operating system portability were a concern (as it should be!), I might suggest MySQL. A Python/MySQL application can jump between Windows to Linux (all flavors!) to Unix to BSD without need to alter a single line of code. You were writing a Python app, weren't you :-) Thomas Bartkus -- http://mail.python.org/mailman/listinfo/python-list
Re: Loop until condition is true
def until(pred): yield None while True: if pred(): break yield None def example(): i = 0 for _ in until(lambda: x==0): x = 10 - i i += 1 print x, i example() pgpeP7iW6mcQm.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: Database recommendations for Windows app
On 6/22/2005 11:38 AM, Thomas Bartkus wrote: Will McGugan [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, I'd like to write a windows app that accesses a locally stored database. There are a number of tables, the largest of which has 455,905 records. Can anyone recommend a database that runs on Windows, is fast / efficient and can be shipped without restrictions or extra downloads? I have googled and found plenty of information on databases, its just that I dont have enough experience with databases to know which one is best for my task! If you are writing strictly for the MS Windows platform And If the database is running single user with a locally stored database on a Windows workstation. Then The MS Access file based (.mdb) system is hard to argue with. You wouldn't have to distribute the (rather expensive) Access application since this is little more than a front for the underlying DAO/ADO database libraries that are built into the warp and woof of MS Windows. Your Python application can address the DAO or ADO directly as these will libraries will be pre-installed and/or freely available for MS Windows. Fast, freely available, no license restrictions, and no need for extra downloads for a reasonably recent (Win2000, XP) operating system. And then XP Autoupdate executes, some of those Access/MSDE libraries are updated, and you app is broken. -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP ? os.listdir enhancement
Riccardo Galli wrote: I noticed that when I use os.listdir I need to work with absolute paths 90% of times. While I can use a for cycle, I'd prefere to use a list comprehension, but it becomes too long. ### e.g. 1 part 1 - getting a list of directories ### dirs=[] for i in os.listdir(path): tmp_path=os.path.join(path,i) if os.path.isdir(tmp_path): dirs.append(tmp_path) ### e.g. 1 part 2 ### dirs=[join(path,x) for x in listdir(path) if isdir(join(path,x))] Using Jason Orendorff's path module, all this code basically collapses down to this beauty (with your variable path renamed to myPath to avoid a name collision): from path import path dirs = path(myPath).abspath().dirs() -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: pickle broken: can't handle NaN or Infinity under win32
On 2005-06-22, Scott David Daniels [EMAIL PROTECTED] wrote: I finally figured out why one of my apps sometimes fails under Win32 when it always works fine under Linux: Under Win32, the pickle module only works with a subset of floating point values. In particular the if you try to dump/load an infinity or nan value, the load operation chokes: There is no completely portable way to do this. Python deals with all sorts of problems for which there is no completely portable solution. Remember: practicality beats purity. Any single platform can have a solution, but (since the C standards don't address how NaNs and Infs are represented) there is not a good portable way to do the pickle / unpickle. Likewise, there is no completely portable python implimentation. Any single platform can have a Python implimentation, but since the C standards don't address a universal standard for a computer there is not a good portable way to do Python. I guess we'd better give up on Python. :) It is nice the exception is raised, since at one point it was not (and a simple 1.0 was returned). That would be even worse. [NaN and Infinity are prefectly valid (and extremely useful) floating point values, and not using them would require huge complexity increases in my apps (not using them would probably at least triple the amount of code required in some cases).] You could check to see if the Python 2.5 pickling does a better job. Otherwise, you've got your work cut out for you. Fixing it is really quite trivial. It takes less than a dozen lines of code. Just catch the exception and handle it. def load_float(self): s = self.readline()[:-1] try: f = float(s) except ValueError: s = s.upper() if s in [1.#INF, INF]: f = 1e300*1e300 elif s in [-1.#INF, -INF]: f = -1e300*1e300 elif s in [NAN,1.#QNAN,QNAN,1.#IND,IND,-1.#IND]: f = -((1e300*1e300)/(1e300*1e300)) else: raise ValueError, Don't know what to do with +`s` self.append(f) Obviously the list of accepted string values should be expanded to include other platforms as needed. The above example handles Win32 and glibc (e.g. Linux). Even better, add that code to float(). -- Grant Edwards grante Yow! Is the EIGHTIES at when they had ART DECO visi.comand GERALD McBOING-BOING lunch boxes?? -- http://mail.python.org/mailman/listinfo/python-list
how to use more than 1 __init__ constructor in a class ?
hi people, can someone tell me, how to use a class like that* (or simulate more than 1 constructor) : #-- class myPointClass: def __init__(self, x=0, y=0): self.x = x self.y = y def __init__(self, x=0, y=0, z=0): self.__init__(self, x, y) self.z = z #-- tia people scott *this is not homework -- http://mail.python.org/mailman/listinfo/python-list
RE: Database recommendations for Windows app
Firebird is cross platform (you would need the classic server version)
look at the following post:
http://mail.python.org/pipermail/python-list/2005-June/286366.html
Chad
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Will McGugan
Sent: Wednesday, June 22, 2005 7:14 AM
To: python-list@python.org
Subject: Database recommendations for Windows app
Hi,
I'd like to write a windows app that accesses a locally stored database.
There are a number of tables, the largest of which has 455,905 records.
Can anyone recommend a database that runs on Windows, is fast /
efficient and can be shipped without restrictions or extra downloads?
I have googled and found plenty of information on databases, its just
that I dont have enough experience with databases to know which one is
best for my task!
Thanks in advance,
Will McGugan
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.join({'*':'@','^':'.'}.get(c,0) or chr(97+(ord(c)-84)%26) for c in
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Re: how to use more than 1 __init__ constructor in a class ?
Hi Scott, can someone tell me, how to use a class like that* (or simulate more than 1 constructor) : One approach could be: class myPointClass: def __init__(self, **args): for k, v in args.items(): setattr(self, k, v) *this is not homework Just to be safe, I'll leave out the explanation :) Regards Steve On 6/22/05, scott [EMAIL PROTECTED] wrote: hi people, can someone tell me, how to use a class like that* (or simulate more than 1 constructor) : #-- class myPointClass: def __init__(self, x=0, y=0): self.x = x self.y = y def __init__(self, x=0, y=0, z=0): self.__init__(self, x, y) self.z = z #-- tia people scott *this is not homework -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: how to use more than 1 __init__ constructor in a class ?
scott wrote: can someone tell me, how to use a class like that* (or simulate more than 1 constructor) : #-- class myPointClass: def __init__(self, x=0, y=0): self.x = x self.y = y def __init__(self, x=0, y=0, z=0): self.__init__(self, x, y) self.z = z #-- Well for the example you used, multiple constructors are not needed. This will get you the same result as what I imagine you wanted the first example to do: class myPointClass: def __init__(self, x=0, y=0, z=0): self.x = x self.y = y self.z = z -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: Database recommendations for Windows app
Dan [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] On 6/22/2005 11:38 AM, Thomas Bartkus wrote: Will McGugan [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] And then XP Autoupdate executes, some of those Access/MSDE libraries are updated, and you app is broken. Hasn't happened yet! For the record - I wouldn't recommend automatic updates of any kind for a Linux/MySQL system either. For precisely the same reasons. Thomas Bartkus -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP ? os.listdir enhancement
Peter Hansen wrote: Using Jason Orendorff's path module, all this code basically collapses down to this beauty (with your variable path renamed to myPath to avoid a name collision): This has to be the non-stdlib library I use the most. It's a great module. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: JEP and JPype in a single process
Steve Menard wrote: skn wrote: Hello, I have written a very simple java class file, which invokes a Python script using JEP. Code snippet:- --- Jep jep = new Jep(false); jep.runScript(C:\\temp\\testscript.py); jep.close(); Now inside this Python script I want to make Java calls using JPype. If I use startjvm() inside this Python script, a Runtime Error (exception) is thrown. Also tried attachThreadToJVM(), but doesn't work, again Runtime Error. Any clues as to how I could achieve my goal?? The interaction shown below should happen in a single process. JAVA == jep == PYTHON == jpype == JAVA Regards, skn You're trying to do something I hope to make possible somewhere down the road ... As of today, I do not think it is possible. JPype does not provide a way to initialize the JVM-bridge system except for startJvm .. which seems to be prohibited when a JVM is already running. AttachThreadToJVM will only work once the JVM-bridge system has been initialize. I will look into providing a sister method to startJVM to attach to the currently running JVM instead of starting a new one. IF it does not require major changes I will release it as 0.5.1. If you'd like you can submit an enhancement request on the JPype sourceforge page, so this doesn't get lost. OK .. it now works. There are a few caveats that cannot be resolved until either JEP and JPype can somehow cooperate or I finish what I started and basically fold the JEP functionality in JPype. I will release the new functionality in as version 0.5.1. The gotchas are going to be in a readme-jep.txt file. -- Steve Menard Maintainer of http://jpype.sourceforge.net -- http://mail.python.org/mailman/listinfo/python-list
MySQLdb reconnect
Does MySQLdb automatically reconnect if the connection to the database is broken? I'm asking this since I have a longrunning Python precess that is connected to Mysql-4.1.11, and I execute set names utf8 when I connect to it. But after running a day the results from the python program were displayed as if the set names utf8 was not executed i.e. I got question marks where utf-8 cyrillics should've appeared. After restarting the Python program everything was ok, just as when I first started it. The long running Python process is actually a scgi quixote web application. -- damjan -- http://mail.python.org/mailman/listinfo/python-list
Re: how to use more than 1 __init__ constructor in a class ?
This recipe that I submitted to the Python Cookbook (http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/223611) describes a technique for doing this. I use the example of creating Color objects for plotting to a bitmap, using either R,G,andB values, or a single integer representing the RGB encoded value. This style you describe is a Java language artifact. If you have optional params, then these really don't represent different method signatures. In my color example, you truly have different signatures, either 3 integers representing color components, or a single encoded integer. -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: how to use more than 1 __init__ constructor in a class ?
scott wrote: hi people, can someone tell me, how to use a class like that* (or simulate more than 1 constructor) : #-- class myPointClass: def __init__(self, x=0, y=0): self.x = x self.y = y def __init__(self, x=0, y=0, z=0): self.__init__(self, x, y) self.z = z #-- You might try: #-- class myPointClass: def __init__(self, x=0, y=0, z=None): self.x = x self.y = y if z is not None: self.z = z #-- You could also turn __init__ into a dispatch fuction: #-- class myPointClass: def __init__(self, *args): if len(args) = 2: self.__init_two(*args) if len(args) == 3: self.__init_three(*args) def __init_two(self, x=0, y=0): self.x = x self.y = y def __init_three(self, x=0, y=0, z=0): self.__init_two(x, y) self.z = z #-- But I would definitely recommend looking at your algorithm to determine if there is a better way to do what you want, that doesn't require an initilizer with two different signatures. -- http://mail.python.org/mailman/listinfo/python-list
timedelta comparision with gmtime()
Hello, I want to know if a certain duration is over. I try it like this with timedelta objects: d = datetime.timedelta(minutes = 2) t = time.gmtime() print (t + d time.gmtime()) gives: TypeError: unsupported operand type(s) for +: 'datetime.timedelta' and 'time.struct_time' How to do that right? Thanks, Florian -- http://mail.python.org/mailman/listinfo/python-list
Re: Loop until condition is true
Magnus Lycka wrote: In some cases, == and is happens to give the same result. a = 1 b = 1 a == b 1 a is b 1 But often not. c = 123456789 d = 123456789 c == d 1 c is d 0 ... First of all, a lot of Python values except 1 (a.k.a. True) are logically true in a Python expression Actually, True and 1 are interesting examples. a, b = 1, True a == b True a is b False I suspect you simply forgot this fact. --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: pickle broken: can't handle NaN or Infinity under win32
Grant Edwards wrote: On 2005-06-22, Scott David Daniels [EMAIL PROTECTED] wrote: ...Under Win32, the pickle module only works with a subset of floating point values. In particular ... infinity or nan ... There is no completely portable way to do this. Python deals with all sorts of problems for which there is no completely portable solution. Remember: practicality beats purity. Any single platform can have a solution, but (since the C standards don't address how NaNs and Infs are represented) there is not a good portable way to do the pickle / unpickle. ... Fixing it is really quite trivial. It takes less than a dozen lines of code. Just catch the exception and handle it. Since you know it is quite trivial, and I don't, why not submit a patch resolving this issue. Be sure to include tests for all supported Python platforms. --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Database recommendations for Windows app
Gregory Piñero wrote: I always figured a problem with using MySQL was distribution. Would you have to tell your users to install MySQL and then to leave the service running? I've never found an easy way to embed MySQL into a python app, and even if you could, would you then have to pay for it? There are more reasons than that not to use MySQL... See e.g. http://sql-info.de/mysql/gotchas.html It seems a lot of the most badly missed features are appearing in MySQL 5.0, but as features are added, I suppose the claimed advantages in performance and simplicity withers away, and these features can hardly be considered very mature yet. (One should also note that MySQL manuals have often claimed that features it lacked were useless, or even dangerous, until MySQL AB decided to implement them themselves... :) Also, the GPL/Commercial licence is not a good thing for commercial apps, particularly since this licence applies even to client libs. Recent PostgreSQL versions are stable, fast, and have native Windows versions. -- http://mail.python.org/mailman/listinfo/python-list
Re: pickle broken: can't handle NaN or Infinity under win32
On 2005-06-22, Scott David Daniels [EMAIL PROTECTED] wrote: Fixing it is really quite trivial. It takes less than a dozen lines of code. Just catch the exception and handle it. Since you know it is quite trivial, and I don't, why not submit a patch resolving this issue. Be sure to include tests for all supported Python platforms. I'm working on it. I should have said it's trivial if you have access to the platforms to be supported. I've tested a fix that supports pickle streams generated under Win32 and glibc. That's using the native string representation of a NaN or Inf. A perhaps simpler approach would be to define a string representation for Python to use for NaN and Inf. Just because something isn't defined by the C standard doesn't mean it can't be defined by Python. -- Grant Edwards grante Yow! I'm shaving!! I'M at SHAVING!! visi.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Database recommendations for Windows app
In article [EMAIL PROTECTED], Dan [EMAIL PROTECTED] wrote: . . . You wouldn't have to distribute the (rather expensive) Access application since this is little more than a front for the underlying DAO/ADO database libraries that are built into the warp and woof of MS Windows. Your Python application can address the DAO or ADO directly as these will libraries will be pre-installed and/or freely available for MS Windows. Fast, freely available, no license restrictions, and no need for extra downloads for a reasonably recent (Win2000, XP) operating system. And then XP Autoupdate executes, some of those Access/MSDE libraries are updated, and you app is broken. Are you saying that Python-based applications are particularly vulnerable in this all-too-common scenario? If so, I'm not getting it; why is the architecture described more fragile than more traditional Windows-oriented development patterns? If not, then, ... well then I truly don't get your point. -- http://mail.python.org/mailman/listinfo/python-list
Re: importing a package
Indeed, when i do this, then it works
import sys
sys.path.append('package')
However, why is it that package isn't added automatically to the pad?
When you execute a python program the directory where the program is is
automatically added to sys.path. No other directory is added to the default
builtin sys.path.
In you case (the second case), you can import package.dir2.file2.
--
damjan
--
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Re: Database recommendations for Windows app
On 2005-06-22, Cameron Laird [EMAIL PROTECTED] wrote: Are you saying that Python-based applications are particularly vulnerable in this all-too-common scenario? If so, I'm not getting it; why is the architecture described more fragile than more traditional Windows-oriented development patterns? If not, then, ... well then I truly don't get your point. Maybe the point is the downside of depending on installed DLLs rather than shipping your own. Dave Cook -- http://mail.python.org/mailman/listinfo/python-list
Re: timedelta comparision with gmtime()
[EMAIL PROTECTED]:~ $ python Use now() from datetime class of datetime module instead of time module. Python 2.4.1 (#2, Mar 30 2005, 21:51:10) [GCC 3.3.5 (Debian 1:3.3.5-8ubuntu2)] on linux2 Type help, copyright, credits or license for more information. py import datetime py t = datetime.datetime.now() py print t 2005-06-22 20:22:36.212142 py d = datetime.timedelta(minutes = 2) py print t + d 2005-06-22 20:24:36.212142 -- http://mail.python.org/mailman/listinfo/python-list
Package organization
Hi, I've two questions concerning organizing and naming things when writing a Python package. - Naming of classes: I'm writing a library that reads PDF files. I have a data structure that represents the large-scale structure of a PDF file (header, trailer, incremental updates etc), and I'll have others, e.g. one that represents the document as a collection of logical objects (page descriptions, images etc). Assume I have a package called PDF. Should the classes then be called simply File and Objects, as it is clear what they do as they are imported from PDF? Or should they be called PDFFile and PDFObjects, as the names would be too undescriptive otherwise? - Organizing subpackages and interfaces: I'm using the zope.interface package in order to define interface classes. In a small package called foo, one might define interfaces IReadableFoo and IWritableFoo in foo.interfaces. However, in a large package foo with subpackages bar and baz, interface definitions might either sit in foo.bar.interfaces and foo.baz.interfaces, or in foo.interfaces.bar and foo.interfaces.baz. Which is preferable? Thanks for any thought on this. -- Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: how to use more than 1 __init__ constructor in a class ?
You also could use a list to represent your data, then you get more
dimensions supported, e.g:
import math
class Point:
def __init__(self, *args):
self.points = list(args)
def dist(x, y):
if len(x.points) != len(y.points):
raise RuntimeError('dimensions not the same')
d = 0
for i in range(len(x.points)):
d += (x.points[i] - y.points[i])**2
return math.sqrt(d)
--
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Re: pickle broken: can't handle NaN or Infinity under win32
Grant Edwards wrote: I'm working on it. I should have said it's trivial if you have access to the platforms to be supported. I've tested a fix that supports pickle streams generated under Win32 and glibc. That's using the native string representation of a NaN or Inf. Several issues: (1) The number of distinct NaNs varies among platforms. There are quiet and signaling NaNs, negative 0, the NaN that Windows VC++ calls Indeterminate, and so on. (2) There is no standard-conforming way to create these values. (3) There is no standard-conforming way to detect these values. --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
debugging - converting PyObject back to a variable name
hi, I'm currently debugging a crash occurring in the Python interpreter. I've got a Dictionary object in the form of a (PyObject *) I can cast it to (dictobject *) in the debugger watch window, and I can also use PyString_AsString(PyObject_Repr()) to get the debugger to print out a string representation of the dictionary (actually I can't - this also crashes, because one of the values in the dictionary has become corrupted) What I'm trying to do is relate this dictionary object back to a variable name in my application source code (i.e. written in Python) - I've been searching round the web for an easy way of doing this - hopefully some function I can type into the debugger's watch window. thanks alot for the help adam -- http://mail.python.org/mailman/listinfo/python-list
create a pdf file
Hello: I found a script that convert a file to PDF format , but it was made in PHP Do you know any script using Python? Regards -- http://mail.python.org/mailman/listinfo/python-list
Re: pickle broken: can't handle NaN or Infinity under win32
Grant Edwards [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I'm working on it. I should have said it's trivial if you have access to the platforms to be supported. I've tested a fix that supports pickle streams generated under Win32 and glibc. That's using the native string representation of a NaN or Inf. A perhaps simpler approach would be to define a string representation for Python to use for NaN and Inf. Just because something isn't defined by the C standard doesn't mean it can't be defined by Python. I believe that changes have been made to marshal/unmarshal in 2.5 CVS with respect to NAN/INF to eliminate annoying/surprising behavior differences between corresponding .py and .pyc files. Perhaps these revisions would be relevant to pickle changes. TJR -- http://mail.python.org/mailman/listinfo/python-list
Re: create a pdf file
On 6/22/2005 1:58 PM, Alberto Vera wrote: Hello: I found a script that convert a file to PDF format , but it was made in PHP Do you know any script using Python? Regards See http://www.reportlab.org/rl_toolkit.html -- http://mail.python.org/mailman/listinfo/python-list
Re: how to use more than 1 __init__ constructor in a class ?
Le 22 Jun 2005 11:44:09 -0700, [EMAIL PROTECTED] a écrit :
You also could use a list to represent your data, then you get more
dimensions supported, e.g:
import math
class Point:
def __init__(self, *args):
self.points = list(args)
def dist(x, y):
if len(x.points) != len(y.points):
raise RuntimeError('dimensions not the same')
d = 0
for i in range(len(x.points)):
d += (x.points[i] - y.points[i])**2
return math.sqrt(d)
My rewrite (same idea) :-)
class Point(object):
def __init__(self, *args):
self.coords = list(args) # or even args ?
def dist(self, other):
d2 = sum([ (c1-c2)*(c1-c2) for c1, c2 in zip(self.coords,
other.coords)])
return math.sqrt(d2)
--
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Re: Package organization
Le Wed, 22 Jun 2005 20:42:24 +0200, Thomas Lotze a écrit : Hi, I've two questions concerning organizing and naming things when writing a Python package. Assume I have a package called PDF. Should the classes then be called simply File and Objects, as it is clear what they do as they are imported from PDF? Or should they be called PDFFile and PDFObjects, as the names would be too undescriptive otherwise? As you whish :-) if in the package ie in the __init__.py (not the best idea) from PDF import File as PDFFile # always possible if File is defined in a module Objects from PDF.Objects import File # as PDFFile is always possible. Have you installed the reportlab package ? It is full of from ... import .. and it generates PDF. -- http://mail.python.org/mailman/listinfo/python-list
Re: pickle broken: can't handle NaN or Infinity under win32
On 2005-06-22, Scott David Daniels [EMAIL PROTECTED] wrote: I'm working on it. I should have said it's trivial if you have access to the platforms to be supported. I've tested a fix that supports pickle streams generated under Win32 and glibc. That's using the native string representation of a NaN or Inf. Several issues: (1) The number of distinct NaNs varies among platforms. According to the IEEE standard, there are exactly two: signalling and quiet, and on platforms that don't impliment floating point exceptions (probably in excess of 99.9% of python installations), the difference between the two is moot. There are quiet and signaling NaNs, negative 0, Negative 0 isn't a NaN, it's just negative 0. the NaN that Windows VC++ calls Indeterminate, and so on. That's just Microsoft's way of spelling signalling NaN. (2) There is no standard-conforming way to create these values. What standard are you looking at? My copy of the IEEE 754 standard is pretty clear. (3) There is no standard-conforming way to detect these values. The bit patterns are defined by the IEEE 754 standard. If there are Python-hosting platoforms that don't use IEEE 754 as the floating point representation, then that can be dealt with. Python has _tons_ of platform-specific code in it. Why all of a sudden is it taboo for Python to impliment something that's not universally portable and defined in a standard? Where's the standard defining Python? -- Grant Edwards grante Yow! ... A housewife at is wearing a polypyrene visi.comjumpsuit!! -- http://mail.python.org/mailman/listinfo/python-list
Re: oddness in shelve module
Michael P. Soulier wrote:
On 22/06/05 John Machin said:
AFAICT, wrong it. The item assignment which is alleged not to be
supported is of this form: an_object[some_key] = a_value
I.e. self.db is the suspect, not sample
Ah. Let me test that it is in fact being created properly then. I
expected an error more like, object has no property db in that case.
Mike
sorry, perhaps I wasn't clear enough -- you seem to think I meant self
has no attribute called db. No, self.db exists, but it doesn't
support the activity of assigning to an indexed item, like a dictionary.
The interactive interpreter is your friend:
adict = {}
adict[3] = 4
notlikeadict = 666
notlikeadict[3] = 4
Traceback (most recent call last):
File stdin, line 1, in ?
TypeError: object does not support item assignment
This is the message that you are thinking about, the word is
attribute, not property.
class Dummy:
...pass
...
x = Dummy()
x.dc
Traceback (most recent call last):
File stdin, line 1, in ?
AttributeError: Dummy instance has no attribute 'dc'
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