[issue44624] Script name for venv PowerShell activate
New submission from Paul Watson : In the venv .\Scripts directory. the name 'Activate.ps1' does not conform to the PowerShell prescribed Verb-Noun format. How about using 'Initialize-Python.ps1' as the script name? Or, something else that does conform to PowerShell standard naming. -- components: Installation messages: 397416 nosy: Paul Watson priority: normal severity: normal status: open title: Script name for venv PowerShell activate type: enhancement ___ Python tracker <https://bugs.python.org/issue44624> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue42798] pip search fails
New submission from Paul Watson :
Fresh install of 3.9.1
Created venv
Activated venv
(py3.9) 13:12:59.52 C:\venv\py3.9\Scripts
C:>pip search astronomy
ERROR: Exception:
Traceback (most recent call last):
File "c:\venv\py3.9\lib\site-packages\pip\_internal\cli\base_command.py",
line 228, in _main
status = self.run(options, args)
File "c:\venv\py3.9\lib\site-packages\pip\_internal\commands\search.py", line
60, in run
pypi_hits = self.search(query, options)
File "c:\venv\py3.9\lib\site-packages\pip\_internal\commands\search.py", line
80, in search
hits = pypi.search({'name': query, 'summary': query}, 'or')
File
"C:\Users\mike\AppData\Local\Programs\Python\Python39\lib\xmlrpc\client.py",
line 1116, in __call__
return self.__send(self.__name, args)
File
"C:\Users\mike\AppData\Local\Programs\Python\Python39\lib\xmlrpc\client.py",
line 1456, in __request
response = self.__transport.request(
File "c:\venv\py3.9\lib\site-packages\pip\_internal\network\xmlrpc.py", line
45, in request
return self.parse_response(response.raw)
File
"C:\Users\mike\AppData\Local\Programs\Python\Python39\lib\xmlrpc\client.py",
line 1348, in parse_response
return u.close()
File
"C:\Users\mike\AppData\Local\Programs\Python\Python39\lib\xmlrpc\client.py",
line 662, in close
raise Fault(**self._stack[0])
xmlrpc.client.Fault: https://status.python.org/ for more information.">
(py3.9) 13:13:08.09 C:\venv\py3.9\Scripts
C:>python --version
Python 3.9.1
--
components: Demos and Tools
messages: 384133
nosy: Paul Watson
priority: normal
severity: normal
status: open
title: pip search fails
type: crash
versions: Python 3.9
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[issue35801] venv in 3.7 references python3 executable
New submission from Paul Watson : The documentation for venv in Python 3.7 references using `python3` to run venv. I do not find a `python3` executable in the kit. https://docs.python.org/3.7/library/venv.html#module-venv -- assignee: docs@python components: Documentation messages: 334165 nosy: Paul Watson, docs@python priority: normal severity: normal status: open title: venv in 3.7 references python3 executable type: enhancement versions: Python 3.7 ___ Python tracker <https://bugs.python.org/issue35801> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue32553] venv says to use python3 which does not exist in 3.6.4
Paul Watson <paul.hermeneu...@gmail.com> added the comment: Ok, I do find later on where it says to do something different on Windows. However, the first "Note" box in "28.3. venv" specifies using "python3". It does not say that this is for non-Windows systems. This should be changed. Also, the path specified, "c:\Python35\python", would not be the default location for a Windows install. "C:\Program Files\Python36\python" or "C:\Program Files (x86)\Python36\python" should be specified. I detest that it is this complex and verbose, but it is. Glossing over it does not help the user. -- ___ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue32553> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue32553] venv says to use python3 which does not exist in 3.6.4
Paul Watson <paul.hermeneu...@gmail.com> added the comment: I am running 3.6.4 from a download on pythong.org yesterday. Python 3.6.4 (v3.6.4:d48eceb, Dec 19 2017, 06:54:40) [MSC v.1900 64 bit (AMD64)] on win32 There is a python3.dll, but no python3 executable. -- ___ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue32553> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue32553] venv says to use python3 which does not exist in 3.6.4
New submission from Paul Watson <paul.hermeneu...@gmail.com>: The 3.6.4 documentation on venv specifies using 'python3', but no python3 executable is in the 3.6.4 kit. https://docs.python.org/3/library/venv.html?highlight=venv#module-venv -- assignee: docs@python components: Documentation messages: 309943 nosy: Paul Watson, docs@python priority: normal severity: normal status: open title: venv says to use python3 which does not exist in 3.6.4 type: enhancement versions: Python 3.6 ___ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue32553> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Django or web2py
I have read some of the talk around these two frameworks. Would you say that web2py is more geared toward the enterprise? Which one do you believe will be on Python 3 more quickly? -- http://mail.python.org/mailman/listinfo/python-list
Re: is there an Python equivalent for the PHP super globals like $_POST, $_COOKIE ?
On 2010-11-11 11:20, Stef Mientki wrote: On 11-11-2010 19:01, Steve Holden wrote: On 11/11/2010 9:22 AM, Stef Mientki wrote: hello, finally got Python running at my server. Now I would like to replace the PHP server scripts with Python ( for easier maintenance). But I can't find how th get to PHP's equivalent of $_Post and $_Cookie ? Google finds lots of links, but I can't find the answer. thanks, Stef Mientki Stef: Moving from one language to anther is not just a matter of transliterating the code. Of you try that you will end up with a messy code base that looks like PHP written in Python. Steve I agree with you, but replacing a number of 3 to 10 lines of code scripts won't create a mess ;-) cheers, Stef regards Steve If there is no automated process to do the translation, then it should be avoided. It is an opportunity for chaos to ensue. -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I skip over multiple words in a file?
On 2010-11-11 08:07, chad wrote: Let's say that I have an article. What I want to do is read in this file and have the program skip over ever instance of the words the, and, or, and but. What would be the general strategy for attacking a problem like this? I realize that you may need or want to do this in Python. This would be trivial in an awk script. -- http://mail.python.org/mailman/listinfo/python-list
distutils, cygwin, 'not a regular file'
So, what is not a regular file about this? Is there any way to find out which files are being considered irregular? $ uname -a CYGWIN_NT-6.0-WOW64 pwatson 1.7.7(0.230/5/3) 2010-08-31 09:58 i686 Cygwin $ cat setup.py from distutils.core import setup setup( name='xlsexport', version='0.3', py_modules=['xlsexport'] ) 20:47 pwatson [ pwatson:/cygdrive/c/Users/pwatson/bin/xlsexport] 12 $ python setup.py sdist running sdist warning: sdist: missing required meta-data: url warning: sdist: missing meta-data: either (author and author_email) or (maintainer and maintainer_email) must be supplied reading manifest file 'MANIFEST' creating xlsexport-0.3 making hard links in xlsexport-0.3... ' not a regular file -- skipping ' not a regular file -- skipping ' not a regular file -- skipping tar -cf dist/xlsexport-0.3.tar xlsexport-0.3 gzip -f9 dist/xlsexport-0.3.tar removing 'xlsexport-0.3' (and everything under it) -- http://mail.python.org/mailman/listinfo/python-list
Current install methodolgy eggs?
What is the currently favored installation process for Python applications? The last time I looked, it was eggs. Is that still true? Is there any integration of eggs and handling into the base Python distribution? Is PEP 376 intended for applications written in Python, or just the Python distribution? Any good links to source of information. I would like to instill the habit of using a decent install process for even the smallest of utilities. -- http://mail.python.org/mailman/listinfo/python-list
Re: Current install methodolgy eggs?
On 2010-09-12 16:40, Ben Finney wrote: This is a dream shared by many, but Distutils has much improvement to be done yet. Recently — the past couple of years — a lot of progress has been made on this front, and Python 3.x is getting many of the benefits; look up the “Distutils2” efforts for more. Many thanks for your comments, Ben. Looks like I should learn distutils well. I see the distutils2 work going on. I hope it is designed to work with Python 2.x. That would help it get some traction in existing packages. Most platforms have an installation methodology. Oracle Solaris (yea, hard for me to get use to as well) has pkgadd. Microsoft has the .msi installer. Do you think it would be possible to create a toolset that would produce installation kits in each of these forms? That would make the install conform with the standard platform installer. Is this worthwhile thinking about? -- http://mail.python.org/mailman/listinfo/python-list
Re: llvm vs. parrot
On Sun, 2009-04-12 at 06:18 -0700, Fuzzyman wrote: On Apr 11, 12:16 am, Paul Watson paul.hermeneu...@gmail.com wrote: Is Parrot out of favor these days? It appears that Google is going to use llvm. http://code.google.com/p/unladen-swallow/ Has Parrot ever been in favour? Actually they're quite different things. Michael -- http://www.ironpythoninaction.com/ Are you saying they are quite different because llvm gets compiled into native code and Parrot bytecode is still interpreted? At the intermediate form, they seem quite similar. Why do you say not? -- http://mail.python.org/mailman/listinfo/python-list
Re: Can I replace this for loop with a join?
On Mon, 2009-04-13 at 17:03 +0200, WP wrote:
Hello, I have dictionary {1:astring, 2:anotherstring, etc}
I now want to print:
Press 1 for astring
Press 2 for anotherstring etc
I could do it like this:
dict = {1:'astring', 2:'anotherstring'}
for key in dict.keys():
print 'Press %i for %s' % (key, dict[key])
Press 1 for astring
Press 2 for anotherstring
but can I use a join instead?
Thanks for any replies!
- WP
In addition to the comments already made, this code will be quite broken
if there is ever a need to localize your package in another language.
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GNUstep and Python
Has anyone used GNUstep? In addition to Objective-C, there are Java and Ruby bindings. Has anyone created a Python binding to GNUstep? -- http://mail.python.org/mailman/listinfo/python-list
llvm vs. parrot
Is Parrot out of favor these days? It appears that Google is going to use llvm. http://code.google.com/p/unladen-swallow/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter book on current versions
On Sat, 2009-03-21 at 08:10 -0700, W. eWatson wrote: Paul Watson wrote: Has anyone tried the Grayson book, Python and Tkinter Programming, with a recent version of Python? The first example code (calculator) generates a single row of buttons. Perhaps I have not applied the errata correctly. Has anyone been successful? I am using: Python 2.5.2 (r252:60911, Dec 1 2008, 17:47:46) If you mean calc1.py, I had no trouble with calc1.py under 2.5, but calc2.py uses Pmw, which I do not have. calc2 has a few problems with mixing tabs and blanks. Ok. It works. I did not type it in correctly. Thanks for your confirmation that it does work. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using python 3 for scripting?
On Sun, 2009-03-22 at 17:00 +, Timo Myyrä wrote: Ok, I think I'll stick with the 2.6 then. I recall it gave warnings about things that are deprecated in 3.0 so it will make porting the scripts to 3.0 easier. I might try 3.0 once I know what kind of scripts are needed. Yes. Develop your code using 2.6, then use the '2to3' utility to port it to 3.0. As others have mentioned, there are -many- third party packages which are not available for 3.0 yet. -- http://mail.python.org/mailman/listinfo/python-list
Tkinter book on current versions
Has anyone tried the Grayson book, Python and Tkinter Programming, with a recent version of Python? The first example code (calculator) generates a single row of buttons. Perhaps I have not applied the errata correctly. Has anyone been successful? I am using: Python 2.5.2 (r252:60911, Dec 1 2008, 17:47:46) -- http://mail.python.org/mailman/listinfo/python-list
Re: newbie: precision question
On Sat, 2009-03-21 at 04:12 +0100, Lada Kugis wrote: I'm a newbie learning python, so forgive for, what may seem to some, like a stupid question. I understand the basic integer and fp type, but what I'm having a little trouble are the long type and infinite precision type. Also, when I do math.pi - (math.sqrt(math.pi))**2. I get 4.4408920985006262e-016 Please, could someone in just a few words, in newbie speak, explain why does that happen ? And what do the types actually mean ? What I mean, how can something have infinite precision but still not return zero as a result. (Btw, I always thought floating points had precision up to 8 significant digits, doubles 16). Nice regards Lada The types used here are 'float'. math.pi 3.1415926535897931 type(math.pi) type 'float' Floating point is inherently imprecise. Whatever encoding is used to represent the number will have a finite size. That finite size puts a limit on the precision available. 1.0/3 0.1 type(1.0/3) type 'float' Do you see how small a number the result represents print %2.32f % (4.4408920985006262e-016) 0.00044408920985006262 Have you tried this in any other programming languages? -- http://mail.python.org/mailman/listinfo/python-list
Re: help I'm getting delimited
On Tue, 2008-12-16 at 08:26 -0800, aka wrote: Hi, I'm going nuts over the csv.reader and UnicodeReader class. Somehow I can't get this method working which is supposed to read a csv file which name is inputted but here now hardcoded. What I need for now is that the string version of the list is put out for control. Later on I will only need to read the first column (id) of the csv file to be able to fill in a session var with a list of all ids. inp = c:/temp/test.csv roles = [] try: fp = open(inp, 'rb') reader = csv.reader(fp) for r in reader: rollen.append(r) except: msg = Er is iets mis met de UnicodeReader return dict(file=in,roles=str(roles)) Any help greatly appreciated! Cheers Did you intend inside the loop to write: roles.append(r) -- http://mail.python.org/mailman/listinfo/python-list
Re: Running Python 2 and Python 3 on the same machine
On Sat, 2008-12-06 at 10:57 +0100, Martin v. Löwis wrote: Ok. I built the source on an openSUSE 11.0 system. I used 'sudo make altinstll'. It created an executable /usr/local/bin/python3.0 file. Nothing was touched in /usr/bin. Ah, then you missed the fun part. Take a look at the install: target in the Makefile. I need to start writing some code with Python 3. I want to write the code in such a way that it can be easily shared with others with the least difficulty and overhead as possible. How should I write the code to enable this? What, if anything, should I assume about another system's configuration? I don't quite understand the problem. Sharing code is very easy over the internet. You can upload it on PyPI (say), or mail it. So you must be asking for something else. As someone suggested before, naming the files as '.py3' is probably a bad idea in the long run. It also does not really solve the problem. I could use a shebang. But, what should it specify? If I use 'python3.0', then that will soon be quite old. If I make up a link for python3 - python3.0, that would work, but then every other system that is to run the code must that link also. However, I am thinking that this would be the best long term answer. Well, this will be rejected. It might be a good medium-term answer, but it is a *bad* long-term answer. In the long term, Python 2 will disappear, and we are stuck with calling the interpreter python3. If I write scripts for Python 3, another developer writes scripts for Python 2, and a common customer wants to install both of our packages onto a single machine, then what is the best plan for everyone to make that happen with as little difficulty as possible? My recommendation is to use distutils, for a long-term answer. People will run python3.0 setup.py install, and distutils' install_scripts will replace the shebang line with the actual path to Python 3.0. This has not only the advantage of continuing to work for 3.1; it has also the advantage that scripts installed into a private location will be run by the correct interpreter (rather than relying on the interpreter being in /usr/bin, or on PATH). For quick sharing, the shebang line #!/usr/bin/env python3.0 will be enough. When Python 3.1 gets released, you may find yourself writing scripts that run only on Python 3.x for x=1 (i.e. won't run on 3.0, because you use a new feature in 3.1). In that case, presence of a python3 executable won't help, either. Regards, Martin Yes! Finally we are getting somewhere. I can see how this can work for distributed packages. I still have two questions. I do not mean to take your individual time for this. If there is documentation I should read, please suggest it. First, let's say that the package has been installed using distutils and the shebang line is set to '#!/usr/local/bin/python3.0'. Now, Python 3.1 is released with a number of speed performance improvements and several security fixes. The existing application is hardcoded to use Python3.0 directly. Does distutils include any mechanism to update this setting so that the package will use a different interpreter? Must the application be installed again in order to update the shebang lines? Second, we frequently have a number of standalone utilities written in Python. When the task requires excessive effort to write in a shell script, Python is a great answer. What is your recommendation for the shebang line on one-off, single .py file utility scripts? -- http://mail.python.org/mailman/listinfo/python-list
Re: Running Python 2 and Python 3 on the same machine
On Fri, 2008-12-05 at 02:10 +0100, Martin v. Löwis wrote: Since the source code is incompatible, I was expecting the Python executable to have a new name such as 'python3' It does: the executable is called python3.0. or for the default source code filename to change to '.py3' or something. Such a proposal would be rejected. In a few years from now, Python 2 will be gone, and we would be stuck with an ugly file extension (similar to how \windows\system is now an empty directory, and \windows\system32 actually contains the 64-bit binaries on x64)- Regards, Martin I have to agree with Terry; installing the released python-3.0.msi results in an executable named 'python.exe' in the filesystem. I have not built it yet, but I assume the *NIX package results in a 'python' executable file. For a machine that runs existing Python 2.x applications, what should be in the PATH variable? For *NIX machines, will 'python' be placed into /usr/bin? If so, then the Python scripts that start out with a shebang like the following will have difficulty. #!/usr/bin/python #!/usr/bin/env python Has there been any guidance issued? -- http://mail.python.org/mailman/listinfo/python-list
Re: Running Python 2 and Python 3 on the same machine
On Sat, 2008-12-06 at 01:27 +0100, Martin v. Löwis wrote: For *NIX machines, will 'python' be placed into /usr/bin? Not by default, no. Just try it and see for yourself. Regards, Martin Ok. I built the source on an openSUSE 11.0 system. I used 'sudo make altinstll'. It created an executable /usr/local/bin/python3.0 file. Nothing was touched in /usr/bin. I need to start writing some code with Python 3. I want to write the code in such a way that it can be easily shared with others with the least difficulty and overhead as possible. How should I write the code to enable this? What, if anything, should I assume about another system's configuration? As someone suggested before, naming the files as '.py3' is probably a bad idea in the long run. It also does not really solve the problem. I could use a shebang. But, what should it specify? If I use 'python3.0', then that will soon be quite old. If I make up a link for python3 - python3.0, that would work, but then every other system that is to run the code must that link also. However, I am thinking that this would be the best long term answer. #!/usr/bin/env python3 My existing /usr/bin directory has three entires for python. python - python2.5 python2 - python2.5 python2.5 If I write scripts for Python 3, another developer writes scripts for Python 2, and a common customer wants to install both of our packages onto a single machine, then what is the best plan for everyone to make that happen with as little difficulty as possible? When we find out the answer to this, we can go back and talk about Windows platforms. -- http://mail.python.org/mailman/listinfo/python-list
Running Python 2 and Python 3 on the same machine
The migration strategy detailed in PEP 3000 using 2to3 is quite nice. However, I am looking for suggestions for migrating to 3 while I still have code that requires 2. Since the source code is incompatible, I was expecting the Python executable to have a new name such as 'python3' or for the default source code filename to change to '.py3' or something. Yes, I have searched some on the web and the newsgroup, so please don't beat me up if this is well known. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: any library for SOAP 1.1 or SOAP 1.2?
On Fri, 2008-01-25 at 16:52 +0530, Amogh Hooshdar wrote: Hi, I wish to know which python library is popular for SOAP related programming, especially for sending SOAP requests and parsing SOAP responses. I can't find any such library in the Python standard library but I could find ZSI and soap.py libraries. However, ZSI does not support SOAP 1.2. Does anyone know about a library that supports SOAP 1.2 also? Support for SOAP 1.2 is on the ZSI wishlist. It may not happen until you and I do it. Have you found anything else? Are you using ZSI? -- http://mail.python.org/mailman/listinfo/python-list
SOAP access to SharePoint
Has anyone successfully accessed a Microsoft SharePoint WSS using Python? No, not IronPython. I need for this to be able to run on all machines the customer might choose. Which libs are you using? ZSI, SOAPpy, soaplib, ??? http://wiki.python.org/moin/WebServices -- http://mail.python.org/mailman/listinfo/python-list
Re: SOAP strategies
On Sat, 2008-02-16 at 10:59 -0600, Paul Watson wrote: What are the reasonable current day choices and best bets for the future when doing SOAP programming in Python? SOAP batteries do not appear to be in the standard Python distribution. Most of the SOAP related information I have been able to find on the web is from 2001-2002. I am not sure if some packages are still maintained. Most of this is old news. http://soapy.sourceforge.net/ http://pywebsvcs.sourceforge.net/ (SOAPpy) and what is the relation of this to ZSI http://www.intertwingly.net/stories/2002/12/20/sbe.html http://www.ibm.com/developerworks/library/ws-pyth5/ http://www.opensourcetutorials.com/tutorials/Server-Side-Coding/Python/python-soap-libraries/page1.html http://www.gossamer-threads.com/lists/python/python/619251 This is current, but is this a long term strategy or a short term tactic? Have I offended? My apologies if I have. I thought I showed that I had done some homework and used Google and did the other things to show that I was willing to put forth some effort. Please tell me if I have missed something. If I should look somewhere besides Python for doing SOAP, then please say that also. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: SOAP strategies
On Tue, 2008-02-19 at 10:01 -0800, Paul Boddie wrote: On 19 Feb, 16:59, Paul Watson [EMAIL PROTECTED] wrote: Have I offended? My apologies if I have. I thought I showed that I had done some homework and used Google and did the other things to show that I was willing to put forth some effort. Please tell me if I have missed something. If I should look somewhere besides Python for doing SOAP, then please say that also. Thanks. There's a Wiki page here about Web services in Python: http://wiki.python.org/moin/WebServices I don't think that there's been a great deal of visible activity around SOAP in the Python community other than that you've already noticed. I entertained the idea of doing some more complete SOAP support as an add-on to the libxml2dom project, but not wanting to implement all the related specifications (schemas, service descriptions), I struggle to see the benefit compared to simpler solutions. That's not to say that SOAP has no value. Clearly, if you consider the different use cases, SOAP is probably more appropriate for some than other solutions would be. If one were exposing some kind of repository through some kind of Web service, I'd consider approaches like REST, along with technologies like WebDAV (which overlaps with REST), XML- RPC and SOAP. But if the Web service were to involve issuing relatively complicated queries, and/or the repository wasn't strictly hierarchical (or couldn't be elegantly represented in such a way), then it would arguably be less appropriate to deploy a pure REST solution, favouring XML-RPC and SOAP instead. What undermines SOAP for me is that if I'm not too interested in treating it like some kind of RPC mechanism, then I can get most of the pertinent benefits from exchanging plain XML documents. You can, of course, do SOAP like this, but the obligation to look after the boilerplate elements (which should permit lots of fancy features like routing, if such stuff is actually used in the real world) seems like a distraction to me. Paul Many thanks for your comments. I will take a look at the site. My primary orientation is in accessing large (one or more terabyte) databases and doing data integration (ETL, ELT, EAI, EII) work. Any other suggestions? -- http://mail.python.org/mailman/listinfo/python-list
Re: SOAP strategies
On Tue, 2008-02-19 at 10:01 -0800, Paul Boddie wrote: On 19 Feb, 16:59, Paul Watson [EMAIL PROTECTED] wrote: Have I offended? My apologies if I have. I thought I showed that I had done some homework and used Google and did the other things to show that I was willing to put forth some effort. Please tell me if I have missed something. If I should look somewhere besides Python for doing SOAP, then please say that also. Thanks. There's a Wiki page here about Web services in Python: http://wiki.python.org/moin/WebServices I don't think that there's been a great deal of visible activity around SOAP in the Python community other than that you've already noticed. I entertained the idea of doing some more complete SOAP support as an add-on to the libxml2dom project, but not wanting to implement all the related specifications (schemas, service descriptions), I struggle to see the benefit compared to simpler solutions. That's not to say that SOAP has no value. Clearly, if you consider the different use cases, SOAP is probably more appropriate for some than other solutions would be. If one were exposing some kind of repository through some kind of Web service, I'd consider approaches like REST, along with technologies like WebDAV (which overlaps with REST), XML- RPC and SOAP. But if the Web service were to involve issuing relatively complicated queries, and/or the repository wasn't strictly hierarchical (or couldn't be elegantly represented in such a way), then it would arguably be less appropriate to deploy a pure REST solution, favouring XML-RPC and SOAP instead. What undermines SOAP for me is that if I'm not too interested in treating it like some kind of RPC mechanism, then I can get most of the pertinent benefits from exchanging plain XML documents. You can, of course, do SOAP like this, but the obligation to look after the boilerplate elements (which should permit lots of fancy features like routing, if such stuff is actually used in the real world) seems like a distraction to me. Paul Many thanks for your comments. I will take a look at the site. My primary orientation is in accessing large (one or more terabyte) databases and doing data integration (ETL, ELT, EAI, EII) work. Any other suggestions? -- http://mail.python.org/mailman/listinfo/python-list
SOAP strategies
What are the reasonable current day choices and best bets for the future when doing SOAP programming in Python? SOAP batteries do not appear to be in the standard Python distribution. Most of the SOAP related information I have been able to find on the web is from 2001-2002. I am not sure if some packages are still maintained. Most of this is old news. http://soapy.sourceforge.net/ http://pywebsvcs.sourceforge.net/ (SOAPpy) and what is the relation of this to ZSI http://www.intertwingly.net/stories/2002/12/20/sbe.html http://www.ibm.com/developerworks/library/ws-pyth5/ http://www.opensourcetutorials.com/tutorials/Server-Side-Coding/Python/python-soap-libraries/page1.html http://www.gossamer-threads.com/lists/python/python/619251 This is current, but is this a long term strategy or a short term tactic? -- http://mail.python.org/mailman/listinfo/python-list
Scripting Visio using Python
I would like to create some additional shapes in Microsoft Visio using the Python language. It would appear that Visio can use any CLR language. Has anyone done this? Can I use the Python package from python.org, or must I use IronPython? -- http://mail.python.org/mailman/listinfo/python-list
Re: PythonCard
Tequila wrote: I'm having some trouble starting PythonCard on my PC. I've downloaded and ran python-2.5.msi to install Python on my machine. And PythonCard-0.8.2.win32.exe to install PythonCard. When I try to run the program I get the following error: == C:\Python25\Lib\site-packages\PythonCard\tools \codeEditorcodeEditor.py Traceback (most recent call last): File C:\Python25\Lib\site-packages\PythonCard\tools\codeEditor \codeEditor.py, line 13, in module from PythonCard import about, configuration, dialog, log, menu, model, resource, util File C:\Python25\lib\site-packages\PythonCard\about.py, line 8, in module import wx ImportError: No module named wx == Does anyone know what the problem might be? Thanks, Tequila It would appear that you need to install wxPython also. http://www.wxpython.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning to program in Python
jbchua wrote: Hello everybody. I am an Electrical Engineering major and have dabbled in several languages such as Python, C, and Java in my spare time because of my interest in programming. However, I have not done any practical programming because I have no idea where to get started. I taught myself these languages basically by e-tutorials and books. This makes me feel as if I don't really know how to implement these languages. Does anybody have any advice on where to start applying my limited knowledge practically in order to advance my learning? This would be a good site to investigate. http://diveintopython.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: what is this?
Eric Price wrote: Hello; I'm studying some code examples from the python cookbook site. I came across this: def colsplit(l, cols): rows = len(l) / cols if len(l) % cols: rows += 1 m = [] for i in range(rows): m.append(l[i::rows]) return m What I'd like to know is what is the double colon? What does it do? m.append(l[i::rows]) Thanks, Eric http://docs.python.org/tut/tut.html http://docs.python.org/tut/node5.html#SECTION00514 http://docs.python.org/ref/slicings.html Probably most helpful to you is: http://developer.mozilla.org/es4/proposals/slice_syntax.html -- http://mail.python.org/mailman/listinfo/python-list
Re: what is this?
Paul Watson wrote: Eric Price wrote: Hello; I'm studying some code examples from the python cookbook site. I came across this: def colsplit(l, cols): rows = len(l) / cols if len(l) % cols: rows += 1 m = [] for i in range(rows): m.append(l[i::rows]) return m What I'd like to know is what is the double colon? What does it do? m.append(l[i::rows]) Thanks, Eric http://docs.python.org/tut/tut.html http://docs.python.org/tut/node5.html#SECTION00514 http://docs.python.org/ref/slicings.html Probably most helpful to you is: http://developer.mozilla.org/es4/proposals/slice_syntax.html Sorry. Probably most helpful to you is: http://docs.python.org/lib/built-in-funcs.html slice( [start,] stop[, step]) Return a slice object representing the set of indices specified by range(start, stop, step). The start and step arguments default to None. Slice objects have read-only data attributes start, stop and step which merely return the argument values (or their default). They have no other explicit functionality; however they are used by Numerical Python and other third party extensions. Slice objects are also generated when extended indexing syntax is used. For example: a[start:stop:step] or a[start:stop, i]. -- http://mail.python.org/mailman/listinfo/python-list
Cannot build 2.5 on FC6 x86
./configure make make test The result appears to hang after the test_tkl... line. I had to kill the 'make test' process which terminated it. Any suggestions? 280 tests OK. 4 tests failed: test_optparse test_socket test_socket_ssl test_urllib2 35 tests skipped: test_aepack test_al test_applesingle test_bsddb185 test_bsddb3 test_cd test_cl test_codecmaps_cn test_codecmaps_hk test_codecmaps_jp test_codecmaps_kr test_codecmaps_tw test_curses test_gl test_imgfile test_linuxaudiodev test_logging test_macfs test_macostools test_nis test_normalization test_ossaudiodev test_pep277 test_plistlib test_scriptpackages test_socketserver test_startfile test_sunaudiodev test_tcl test_timeout test_urllib2net test_urllibnet test_winreg test_winsound test_zipfile64 2 skips unexpected on linux2: test_tcl test_logging make: *** [test] Terminated Terminated -- http://mail.python.org/mailman/listinfo/python-list
Re: Cannot build 2.5 on FC6 x86
Martin v. Löwis wrote: Paul Watson schrieb: ./configure make make test The result appears to hang after the test_tkl... line. I had to kill the 'make test' process which terminated it. Any suggestions? There isn't (or shouldn't be) any test_tkl... line. What precisely was the line, and how long did you wait until you thought it hangs? Regards, Martin Sorry, I mis-typed. It is not test_tkl. It was test_tcl... The last line output was as shown below my mistyping. I let it sit overnight one time. -- http://mail.python.org/mailman/listinfo/python-list
Re: A question about unicode() function
JTree wrote:
Thanks everyone!
Sorry for my ambiguous question.
I changed the codes and now it works fine.
JTree wrote:
Hi,all
I encountered a problem when using unicode() function to fetch a
webpage, I don't know why this happenned.
My codes and error messages are:
Code:
#!/usr/bin/python
#Filename: test.py
#Modified: 2006-12-31
import cPickle as p
import urllib
import htmllib
import re
import sys
def funUrlFetch(url):
lambda url:urllib.urlopen(url).read()
objUrl = raw_input('Enter the Url:')
content = funUrlFetch(objUrl)
content = unicode(content,gbk)
print content
content.close()
error message:
C:\WINDOWS\system32\cmd.exe /c python test.py
Enter the Url:http://www.msn.com
Traceback (most recent call last):
File test.py, line 16, in ?
content = unicode(content,gbk)
TypeError: coercing to Unicode: need string or buffer, NoneType found
shell returned 1
Hit any key to close this window...
Any suggestions would be appreciated!
Thanks!
So... How about posting the brief working code?
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Re: Help with small program
Tim Roberts wrote:
[EMAIL PROTECTED] wrote:
Interesting impl in Python! I am wondering what if the requirement is
to find the minimum number of coins which added to the fin sum...
Given the set of coins in the original problem (100, 10, 5, 1, 0.5), the
solution it provides will always be optimal. Even if we change this to
American coinage (50, 25, 10, 5, 1), I believe it is still optimal.
It is certainly possible to construct a set of denominations for which the
algorithm occasionally chooses badly. For example, if you give it the set
(40,35,10) and ask it to make change for 70, it will be suboptimal.
Tim,
Unless I am missing the point, the minimum number of coins from the set
available will be chosen. Surely this homework is past due by now.
$ cat coins.py
#!/usr/bin/env python
import sys
cointypes = (100, 10, 5, 1, 0.5)
def coins(fin, cointypes):
needed = {}
for c in cointypes:
v, r = divmod(fin, c)
if v 0:
needed[c] = int(v)
fin = r
return needed
def doit(fin, cointypes = cointypes):
h = coins(fin, cointypes)
print '%.1f requires %d coins in hash ' % (fin, sum(h.values())), h
if __name__ == '__main__':
doit(51)
doit(127)
doit(12.5)
doit(70, (40,35,10))
sys.exit(0)
$ ./coins.py
51.0 requires 6 coins in hash {1: 1, 10: 5}
127.0 requires 6 coins in hash {1: 2, 10: 2, 100: 1, 5: 1}
12.5 requires 4 coins in hash {0.5: 1, 1: 2, 10: 1}
70.0 requires 4 coins in hash {40: 1, 10: 3}
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Re: Help with small program
smartbei wrote:
Felix Benner wrote:
smartbei schrieb:
Hello, I am a newbie with python, though I am having a lot of fun using
it. Here is one of the excersizes I am trying to complete:
the program is supposed to find the coin combination so that with 10
coins you can reach a certain amoung, taken as a parameter. Here is the
current program:
coins = (100,10,5,1,0.5)
anslist = []
def bar(fin, hist = {100:0,10:0,5:0,1:0,0.5:0}):
s = sum(x*hist[x] for x in hist)
l = sum(hist.values())
if s fin and l 10:
for c in coins:
if (s+c) = fin:
hist[c] += 1
bar(fin, hist)
hist[c] -= 1
elif l==10 and s==fin and not hist in anslist:
#p1
anslist.append(hist)
bar(50)
print anslist
The problem is that if I run it, anslist prints as [{0.5: 0, 1: 0, 10:
0, 100: 0, 5: 0}], which doesnt even add up to 50. When I check how
many times the program has reached the #p1 by sticking a print there,
it only reaches it once, and it comes out correct. why is it that this
result is replaced by the incorrect final one?
hist is stored in anslist as a pointer only, therfore the hist[c] -= 1
operates on the same dict as is stored in the anslist. Try the following
in the python interpreter:
a = { 'key' : 1 }
l = [a]
l[0]['key'] -= 1
a
instead use:
anslist.append(dict(hist.items))
which will copy the dict.
Thanks!
BTW - its hist.items(), after that it worked.
An alternative.
cointypes = (100, 10, 5, 1, 0.5)
needed = {}
def coins(fin):
cur = fin
for c in cointypes:
v = int(cur / c)
if v 0:
needed[c] = v
cur -= v * c
if __name__ == '__main__':
coins(51)
print needed
coins(127)
print needed
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Re: Help with small program
Better alternative.
cointype = (100, 10, 5, 1, 0.5)
def coins(fin):
needed = {}
for c in cointypes:
v, r = divmod(fin, c)
if v 0:
needed[c] = v
fin = r
return needed
if __name__ == '__main__':
print coins(51)
print coins(127)
print coins[12.5)
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Re: convert from date string to epoch
Stefan Antonelli wrote:
Hi,
i have to convert several timestamps. The given format, eg -mm-dd
hh:mm:ss
has to be converted to an epoch string. Is there any proper way to do this?
If not, i have to split the given string and resolve this by a calculation?
Thanks for help.
Stefan.
I saw some code on the net. ASPB I think. I whacked a few more lines
to be an example.
#!/usr/bin/env python
import httplib
import time
ht = httplib.HTTP('www.python.org')
fich='/index.html'
print fich,
ht.putrequest('GET', fich)
ht.endheaders()
errcode, errmsg, headers = ht.getreply()
print headers.dict
print headers.dict['server']
textoFecha=headers.dict['date']
print textoFecha
fecha = time.strptime(textoFecha,'%a, %d %b %Y %H:%M:%S %Z')
print fecha
print time.asctime(fecha)
print time.mktime(fecha)
print ===
fecha = time.strptime('2006-12-15 19:42','%Y-%m-%d %H:%M')
print fecha
print time.asctime(fecha)
print time.mktime(fecha)
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Re: how to determine Operating System in Use?
Ian F. Hood wrote: Hi In typically windows environments I have used: if 'Windows' in os.environ['OS']... to prove it, but now I need to properly support different environments. To do so I must accurately determine what system the python instance is running on (linux, win, mac, etc). Is there a best practises way to do this? TIA Ian The more significant question is why do you want to do this? Are you writing an asset management tool? Do you just want to tell the user what operating system they are using? The reason may lead to a different solution. -- http://mail.python.org/mailman/listinfo/python-list
Re: ooopy: newbie cannot get basic functionality to work
Andrew Sackville-West wrote: Hi list, I am new to python and old to coding (as in I did it a long time ago). I've got a task that cries out for a scripted solution -- importing chunks of ASCII data dumps from a point-of-sale system into an openoffice.org spreadsheet. What a great chance for me to get my coding skills back and learn python too! The openoffice.org spreadsheet tool can read a CSV file. How about producing that first, just so you have something that works. I agree, this sounds like a nice way to dive into Python, but you might want something that works first, even if it is not elegant. -- http://mail.python.org/mailman/listinfo/python-list
Re: newbie: minidom
Fredrik Lundh wrote:
Danny Scalenotti wrote:
I'm not able to get out of this ...
from xml.dom.minidom import getDOMImplementation
impl = getDOMImplementation() // default UTF-8
doc = impl.createDocument(None, test,None)
root = doc.documentElement
root.setAttribute('myattrib', '5')
print root.toxml()
I obtain
test myattrib=5/
why not this?
?xml version=1.0 encoding=UTF-8?
test myattrib=5/
why? the documents are equivalent, and any XML application that
requires an explicit UTF-8 encoding declaration is broken.
/F
Explicit is better than implicit.
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Re: codecs - where are those on windows?
GHUM wrote: I stumbled apon a paragraph in python-dev about reducing the size of Python for an embedded device: In my experience, the biggest gain can be obtained by dropping the rarely-used CJK codecs (for Asian languages). That should sum up to almost 800K (uncompressed), IIRC. So, my question is: on Windows. where are those CJK codecs? Are they by any chance included in the 1.867.776 bytes of python24.dll ? Best wishes, Harald If your installation directory is C:\Python25, then look in C:\Python25\lib\encodings -- http://mail.python.org/mailman/listinfo/python-list
PyXML not supported, what to use next?
It would appear that xml.dom.minidom or xml.sax.* might be the best thing to use since PyXML is going without support. Best of all it is included in the base Python distribution, so no addition hunting required. Is this right thinking? Is there a better solution? -- http://mail.python.org/mailman/listinfo/python-list
Re: best small database?
David Isaac wrote: I have no experience with database applications. This database will likely hold only a few hundred items, including both textfiles and binary files. I would like a pure Python solution to the extent reasonable. Suggestions? Thank you, Alan Isaac If you want really simple, look at the anydbm module. If nothing better is available, anydbm will use dumbdbm. All of these are in the Python build, so you do not need to fetch/read/install anything additional. Doing the DB-API would be much stronger, but might be overkill in your situation. -- http://mail.python.org/mailman/listinfo/python-list
Re: to thine own SELF be true...
Michael Ekstrand wrote: On Fri, May 05, 2006 at 05:08:24PM +, Mark Harrison wrote: Is there a way to get rid of those the self. references, or is this just something I need to get my brain to accept? It's pretty much just something you'll need to get your brain to accept. You can replace self with something shorter, like s, but that's sure to cause mass confusion for other people who try to read your code. I, however, find that the self. references are a great benefit to readability, as it makes the scope of a variable quite easy to tell. A lot of my C++ code is littered with `this-' or similar explicit-scope-description things... - Michael This fits perfectly with Explicit is better than implicit. -- http://mail.python.org/mailman/listinfo/python-list
Re: installing pyodbc
timw.google wrote:
I just downloaded the pyodbc source to try and install on my Linux FC3
box. I see that there is a setup.py file, but when I try to do a
'python setup.py build' (or just 'python setup.py') I get
Traceback (most recent call last):
File setup.py, line 27, in ?
revision = latest_revision('.')
File setup.py, line 25, in latest_revision
return int(output)
ValueError: invalid literal for int(): exported
The README.txt doesn't really say anything about how to install, exept
that the easiest way is to use the Windows installer. That's fine for
Windows, but what about Linux?
Thanks for any help.
Have you read the http://sourceforge.net/projects/pyodbc/ summary page
where the Operating System indicates which platforms are supported?
That might be relevant information.
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Re: finding IP address of computer
DarkBlue wrote:
Chris wrote:
How do I find and print to screen the IP address of the computer my
python program is working on?
def readip():
import re, urllib
f = urllib.urlopen('http://checkip.dyndns.org')
s = f.read()
m = re.search('([\d]*\.[\d]*\.[\d]*\.[\d]*)', s)
return m.group(0)
myip = readip()
IP address and other browser header information available at:
http://xhaus.com/headers
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Is pwm Python MegaWidgets viable?
Does pwm run well on Python 2.4? The last release appears to be in 2003. The Manning discussion forum is dead. Is there a better path to learning and producing tkInter apps? Has there been any discussion of wxPython becoming part of the base Python distro? A requirement here is to not require download/install of anything other than the Python release. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is pwm Python MegaWidgets viable?
gregarican wrote: Paul Watson wrote: Does pwm run well on Python 2.4? The last release appears to be in 2003. The Manning discussion forum is dead. Is there a better path to learning and producing tkInter apps? Has there been any discussion of wxPython becoming part of the base Python distro? A requirement here is to not require download/install of anything other than the Python release. I can't vouch for Python 2.4, but I used the PMW library pretty extensively for an app that is based on Python 2.3. Tkinker itself offers most of the basic widgets that any Tk implementation does, and there's an online guide (can't recall the URL right now) to Tkinter that is great for an introduction tutorial. PMW is an add-on to Tkinter that is useful if there are specific widgets that you need that basic Tkinter doesn't provide and you don't feel like creating them from scratch. Just because it doesn't have a new release in the past couple of years doesn't mean that it's truly a dead project. Perhaps it's stabilized and there haven't been overwhelming requests for adding any new items to it. Using PMW won't help you learn Tkinter any quicker in any event. Just icing on the cake :-) Many thanks for your reply. I was setting out to make use of the Manning book by Grayson. Perhaps I should just use online tutorial and such for learning plain-old tk first. However, I have heard good things about the book. Just trying to use what was already at hand. -- http://mail.python.org/mailman/listinfo/python-list
Re: ftp: get list of files
Lawrence Oluyede wrote:
eels [EMAIL PROTECTED] writes:
With yyy = ftp.retrlines('LIST') I get this listing at stdout, but I
need this information at variable yyy.
How can I resolve this problem?
As written in the doc retrlines has an optional parameter (a callback
function)
called on each line retrieved, so you can do something like this:
from ftplib import FTP
def writeline(data):
fd.write(data + \n)
f = FTP('ftp.kernel.org')
f.login()
f.cwd('/pub/linux/kernel')
fd = open('README', 'wt')
f.retrlines('RETR README', writeline)
fd.close()
f.quit()
How about a little more portability?
def writeline(data):
fd.write(data + os.linesep)
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Re: Using non-ascii symbols
Christoph Zwerschke wrote: On the page http://wiki.python.org/moin/Python3%2e0Suggestions I noticed an interesting suggestion: These operators ≤ ≥ ≠ should be added to the language having the following meaning: = = != this should improve readibility (and make language more accessible to beginners). This should be an evolution similar to the digraphe and trigraph (digramme et trigramme) from C and C++ languages. How do people on this group feel about this suggestion? The symbols above are not even latin-1, you need utf-8. (There are not many usefuls symbols in latin-1. Maybe one could use × for cartesian products...) And while they are better readable, they are not better typable (at least with most current editors). Is this idea absurd or will one day our children think that restricting to 7-bit ascii was absurd? Are there similar attempts in other languages? I can only think of APL, but that was a long time ago. Once you open your mind for using non-ascii symbols, I'm sure one can find a bunch of useful applications. Variable names could be allowed to be non-ascii, as in XML. Think class names in Arabian... Or you could use Greek letters if you run out of one-letter variable names, just as Mathematicians do. Would this be desirable or rather a horror scenario? Opinions? -- Christoph This will eventually happen in some form. The problem is that we are still in the infancy of computing. We are using stones and chisels to express logic. We are currently faced with text characters with which to express intent. There will come a time when we are able to represent a program in another form that is readily portable to many platforms. In the meantime (probably 50 years or so), it would be advantageous to use a universal character set for coding programs. To that end, the input to the Python interpreter should be ISO-10646 or a subset such as Unicode. If the # -*- coding: ? -*- line specifies something other than ucs-4, then a preprocessor should convert it to ucs-4. When it is desireable to avoid the overhead of the preprocessor, developers will find a way to save source code in ucs-4 encoding. The problem with using Unicode in utf-8 and utf-16 forms is that the code will forever need to be written and forever execute additional processing to handle the MBCS and MSCS (Multiple-Short Character Set) situation. Ok. Maybe computing is past infancy. But most development environments are not much past toddler stage. -- http://mail.python.org/mailman/listinfo/python-list
Re: Need Help with Python/C API
pycraze wrote:
Hi guys,
I Need to know how do i create a dictionary... eg:
n = pali_hash
n={}
n={1:{ } } - i need to know how to make a key of a dictionary, to a
dictionary using Python/C API's
It looks like you are asking how to create a dictionary (hash). If it
is more than that, then please add some information.
$ python
Python 2.4.1 (#1, Jul 19 2005, 14:16:43)
[GCC 4.0.0 20050519 (Red Hat 4.0.0-8)] on linux2
Type help, copyright, credits or license for more information.
n = {}
n[3] = 'abc'
n['x'] = 7
n
{'x': 7, 3: 'abc'}
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Re: Removing a substring from a string
ankit wrote:
Hi All,
I want to remove a substring from a string without any additional
tabs/returns in the output string. Is there any method availaible or
how can I do it. For the ease, I am giving an example:
[code]
mainstr =
${if:isLeaf}
Dont include this isLeaf=True
${/if:isLeaf}
${if:isStatic}
include this isStatic=True
${/if:isStatic}
${if:!isLeaf}
include this isLeaf=False
${/if:!isLeaf}
[/code]
Now if I want to remove :
[code]
substr =
${if:isLeaf}
Dont include this isLeaf=True
${/if:isLeaf}
[/code]
Expected output is :
[code]
${if:isStatic}
include this isStatic=True
${/if:isStatic}
${if:!isLeaf}
include this isLeaf=False
${/if:!isLeaf}
[/code]
I am using mainstr.replace(substr, ) but it gives me additional
carriage returns which leads to empty spaces as follows:
Actual Output:
[code]
${if:isStatic}
include this isStatic=True
${/if:isStatic}
${if:!isLeaf}
include this isLeaf=False
${/if:!isLeaf}
[/code]
Note: See additional newlines before isStatic tag
Any Suggestions ?
Are you using 'print' to get the output? Please see the following code
and note what the 'print' lines which have a comma at the end produce.
The 'print' statement is not always suitable for producing closely
controlled output. Consider constructing the exact string you want and
using a 'write' method.
$ cat ./jjj.py
#!/usr/bin/python
s = 'now'
print s
print s,
print s
x = s.replace('now', '')
print '%s' % x,
print 'then'
09:34 pwatson [ ruth:/home/pwatson ] 431
$ ./jjj.py
now
now now
then
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Re: return values of os.system() on win32
rbt wrote:
Is it safe to say that any value returned by os.system() other than 0 is
an error?
if os.system('winver') != 0:
print Winver failed!
else:
print Winver Worked.
Thanks!
What are you really seeking to do? Are you wanting to detect if your
code is running on a Windows machine? Are you wanting to know the
version number of Windows? Why not use popen2() and see the output?
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Re: Creating shortcuts?
Ron Griswold wrote: Hi Dennis, Yes, I am equating a unix soft link to a windows shortcut. Both act as links to a file or directory. I have found that windows shortcuts do appear in linux dir listings with a .lnk extension, however the file is meaningless to linux. On the other hand, a linux soft link does not appear in a windows directory listing, not that I really want it to. As for os.link and os.symlink, these appear to be unix specific. It would be nice if os.symlink, when run on windows, would create a shortcut. Thanks, Ron Griswold Character TD R!OT Pictures [EMAIL PROTECTED] -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dennis Lee Bieber Sent: Friday, January 13, 2006 12:26 AM To: python-list@python.org Subject: Re: Creating shortcuts? On Thu, 12 Jan 2006 22:53:42 -0800, Ron Griswold [EMAIL PROTECTED] declaimed the following in comp.lang.python: Is it possible to create a shortcut to a file in Python? I need to do this in both win32 and OSX. I've already got it covered in Linux by system(ln...). Are you equating a Windows shortcut to a Unix link? Soft link, at that, I suspect -- as a hard link can be done using os.link(), though a soft link can be done with os.symlink(). Lets see if my terminology is correct: a hard link is an additional directory entry pointing to a pre-existing file (with a count of how many entries exist for the file); a soft link is basically a special file that contains the full path to the actual file (and hence, could cross file system boundaries). I don't think Windows shortcuts are the same thing (as my memory struggles, I have vague inklings that NTFS actually supports Unix-like links, but practically nothing uses them). At best, they may be similar to a soft link, being a particular type of file, being that they are files with a .lnk extension (and hidden by the OS normally) UNIX links and Windows .lnk files are not the same thing. Links on UNIX, both soft and hard, are known by the filesystem. .lnk files on Windows are recognized by the OS as indicating that a different file is to be used. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to get Windows system information?
Martin P. Hellwig wrote: [EMAIL PROTECTED] wrote: Does anybody know how to get the: Free hard disk space Amount of CPU load and Amount of RAM used on windows? I am making an artificial intelligence program that has moods based on how much stress the system is under, based on these parameters. I think it could possibly be done via COM. I am not looking for a cross-platform solution- just something that will work on Windows. Thank you for your help! Have a look at WMI* , it's specifically designed to getthat kind of stuff, there is also a python layer for WMI**. * http://msdn.microsoft.com/library/en-us/wmisdk/wmi/wmi_reference.asp ** http://tgolden.sc.sabren.com/python/wmi.html hth WMI sounds like the right way to go. I recently had to whack a little WHS because I could find no Python interface without downloading additional modules. Do you think Tim Golden would submit it for inclusion with the standard Python build? If so, would that require pywin32 to be in the build or could Tim do this through ctypes? -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling foreign functions from Python? ctypes?
Neil Hodgson wrote: Paul Watson: I cannot find any way to get to GetVersionInfo in VBScript (cscript). Set objFSO = CreateObject(Scripting.FileSystemObject) Wscript.Echo objFSO.GetFileVersion(c:\bin\SciLexer.dll) Many thanks. Just what I needed. (Short of ctypes.) Thank you for tolerating a VBScript question here. -- http://mail.python.org/mailman/listinfo/python-list
Re: Viewing Binary Data
Cuyler wrote: I would like to display a file in its binary form (1s and 0s), but I'm having no luck... Any thoughts would be most appreciated. If you are on a UNIX system, or on Windows with Cygwin, you can use the 'od' command to dump a file in hex or octal. man od od -Ax -tx1 -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling foreign functions from Python? ctypes?
Martin v. Löwis wrote: Paul Watson wrote: I need to call GetVersionInfo() and handle VERSIONINFO information. I thought that distutils might have something, but I do not see it yet. Any suggestions? You could write this specific API in VB, and then run cscript.exe in a pipe; or you could write a wrapper module just for that specific API (in case PythonWin is too large for you). I cannot find any way to get to GetVersionInfo in VBScript (cscript). If so, this appears to leave me with no choice but to produce a Windows executable, whether a .exe or C code wrapped from Python. Right? -- http://mail.python.org/mailman/listinfo/python-list
Calling foreign functions from Python? ctypes?
I need to call some Windows APIs. Is the only way to download ctypes or the win32 interfaces? Is there any plan to get ctypes batteries into the standard Python build? -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling foreign functions from Python? ctypes?
Neil Hodgson wrote: Paul Watson: Is there any plan to get ctypes batteries into the standard Python build? It is unlikely that ctypes will be included in the standard Python build as it allows unsafe memory access making it much easier to crash Python. Does extending Python with any C/C++ function not do the same thing? -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling foreign functions from Python? ctypes?
Martin v. Löwis wrote: Paul Watson wrote: I need to call some Windows APIs. Is the only way to download ctypes or the win32 interfaces? That depends on the specific win32 interface you want to call. Typically, the answer is yes. I have used _winreg and I see winsound in the doc. I need to call GetVersionInfo() and handle VERSIONINFO information. I thought that distutils might have something, but I do not see it yet. Any suggestions? -- http://mail.python.org/mailman/listinfo/python-list
Re: nesting for statements?
[EMAIL PROTECTED] wrote:
I'm not what you'd call a programmer of any sort, so perhaps this
question may seem arcane and result in a plethora of you idiot
threads, but here goes:
ArcGIS 9.1 has a neat interface with python (2.1-2.4), allowing me to
do all sorts of spatial operations within python, namely, repetitive
functions.
In the below code, I'm trying to iterate thru multiple values of the
variable Discretisation error factor using a for statement that
temporarily populates Disc, which is used as input in Discretisation
error factor in the gp.TopoToRaster._sa function.
For each iteration of Discretisation error factor, I'm trying to name
the output file outa, outb, out
Not quite sure how to implement that. There are lots of examples on
nested for loops out there, but nothing on combing that with a output
file naming sheme.
The gp.TopoToRaster_sa function by itself without all the for
statements works fine.
Appreciate any help on this, other wise I have to manually interpolate
hundreds of LiDAR point clouds, each, 10 times for diff. values of DEF.
# TopoToRaster_sample.py
# Description: Interpolate a series of point features onto a
rectangular raster using TopoToRaster
# Requirements: None
# Author: ESRI
# Date: 12\\01\\03
# Import system modules
import sys, string, os, win32com.client
# Create the Geoprocessor object
from win32com.client import Dispatch
gp = Dispatch(esriGeoprocessing.GpDispatch.1)
# Check out any necessary licenses
gp.CheckOutExtension(spatial)
# Iterate 2 thru 4 in increments of 2 for DEF
# Name the 2 dem outa and the 4 dem outb
for x in range(2,4):
Disc = int(x)
names = [a,b]
for y in names:
Out_Dem = out+y
try:
# Process: Topo to Raster...
gp.TopoToRaster_sa(C:\\temp\\falls_lidar.shp Z PointElevation,
Out_Dem, # Variable for name of output raster.
This should increment name of output based on the for statement
5, # Output raster cell size: each pixel is 5
feet by 5 feet
2103763.27 813746.12 2111850.32 822518.65,
#extent of raster borders, SPF, NC, NAD83
20, # #Grid Margin
, #Smallest z value to be used in
interpolation (optional)
, #Largest z value to be used in interpolation
(optional)
NO_ENFORCE, #Drainage option
SPOT, #Spot data option
40, #Maximum number of iterations (optional)
, #Roughness penalty (optional)
Disc, #Discretisation error factor: This should
increment DEF based on the for statement
0, #Vertical standard error (optional)
, #Tolerance 1 (optional)
#Tolerance 2 (optional)
)
except:
print ERROR OCCURED
print gp.GetMessages()
I think you want a filename generated for each pass through the loop. I
would suggest generating the filenames before you ever start the loop in
a list. Then, reference the filename list while you are in the loop.
You could also construct the filename while you are in the loop.
sor = 2 # start of range
eor = 4 # end of range
filenames = ['file' + chr((x-sor) + ord('a')) for x in range(sor, eor)]
for x in range(sor, eor):
print filenames[x - sor]
If you do not want to create all of the filenames in memory at one time,
you could generated them during the loop. However, this will not work
well when you code is run on a system not using ASCII character encoding.
for x in range(sor, eor):
print 'file' + chr((x - sor) + ord('a'))
Something using string.ascii_lowercase would work better. My guess is
that on the mainframe using EBCDIC character encoding that
string.ascii_lowercase still contains the LATIN SMALL LETTER characters,
just as it does on ASCII-based systems.
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Re: Writing pins to the RS232
[EMAIL PROTECTED] wrote:
I want to write to the pins of an RS232 without using the serial
protocol. The use would be every pin could act to complete a circuit
in customized hardware. I could use python to communicate serially to
a BASIC stamp or a Javelin stamp and then use the stamp to set however
many pins as 0's or 1's but should it be that hard to do with python.
I've looked through how python does serial with the serial module but
it just uses Java's javax.comm libraries. Is there anyway to do very
low level device writing to COM ports?
In summary I'm looking for something like:
ser = serial.Serial(0)
ser.pin0 = 1
ser.pin1 = 1
ser.pin2 = 1
or
ser.write('0xFF')
which would set 8 pins on the RS232 cable to 1's
Accessing hardware at this level is almost always managed by some form
of device driver in any real operating system. Even Microsoft Windows
has device drivers for serial and parallel ports. This is not your
father's MS-DOS any more. It would be a security breach to allow user
applications direct access at the hardware level.
Also, if you ever hope to run on anything except an IBM-PC clone, then
the hardware will be different. Even systems that run x86 processors
like the NEC PC-98 have 8255 parallel interfaces, but they are located
on different ports in the machine.
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Re: Which License Should I Use?
mojosam wrote: I've been watching the flame war about licenses with some interest. There are many motivations for those who participate in this sector, so disagreements over licenses reflect those agendas. I don't have an agenda, at least not right now. I do plan on writing a few programs. These will be tools I need for firmware testing. They will be relatively simple things like tools for breaking down data by its structure for easy viewing, sending commands/macros over serial ports, etc. Similar things exist, but they don't do everything I need. These will also be excellent learning opportunities for me, since I'm still pretty shaky on Python. How do I decide on a license? Are there any web sites that summarize the pros and cons? I guess I don't care too much about how other people use it. These things won't be comprehensive enough or have broad enough appeal that somebody will slap a new coat of paint on them and try to sell them. I guess I don't care if somebody incorporates them into something bigger. If somebody were to add features to them, it would be nice to get the code and keep the derivative work as open source, but I don't think that matters all that much to me. If somebody can add value and find a way of making money at it, I don't think I'd be too upset. I will be doing the bulk of the coding on my own time, because I need to be able to take these tools with me when I change employers. However, I'm sure that in the course of using these tools, I will need to spend time on the job debugging or tweaking them. I do not want my current employer to have any claim on my code in any way. Usually if you program on company time, that makes what you do a work for hire. I can't contaminate my code like that. Does that mean the GPL is the strongest defense in this situation? I'm open to suggestions as to which licenses to consider. However, please try to keep the conversation to the decision process or what sounds like it is best for this purpose. Let's keep the broader issue of which license will bring about the fall of Western Civilization on the other thread. Ron Britton (The gibberish on the next line really is my email address.) nk67v8o02 at sneakemail.com As mentioned earlier, your employer may lay some claim to the result if it substantially relates to your work. Using your employer's equipment to develop or test the code might also be an indication that it is a work for hire. Either that, or you misused the company's assets for personal gain. Neither sounds very attractive. -- http://mail.python.org/mailman/listinfo/python-list
Re: 2.4.2 on AIX fails compiling _codecs_cn.c
Martin v. Löwis wrote: Paul Watson wrote: It appears that _ALL_SOURCE gets defined in the /usr/include/standards.h file. If we could #define _ANSI_C_SOURCE or _POSIX_SOURCE, it appears that it would eleminate _ALL_SOURCE. Ah, ok - this should be easy enough. Python would normally define _POSIX_SOURCE (through _XOPEN_SOURCE), but configure(.in) has this block: # On AIX 4 and 5.1, mbstate_t is defined only when _XOPEN_SOURCE == 500 but # used in wcsnrtombs() and mbsnrtowcs() even if _XOPEN_SOURCE is not defined # or has another value. By not (re)defining it, the defaults come in place. AIX/4) define_xopen_source=no;; AIX/5) if test `uname -r` -eq 1; then define_xopen_source=no fi ;; which causes _XOPEN_SOURCE (and subsequently probably _POSIX_SOURCE) not to be defined. What AIX version are you using? Can you try removing the fragment from configure(.in), rerun configure, verify that _XOPEN_SOURCE is defined in pyconfig.h, and then try building again? If this works, this might be a solution. Otherwise, we need to put something like this into _codecs_cn.c: #ifdef hz /* On AIX version such-and-such, hz is defined because _ALL_SOURCE is defined, this in turn is defined because _XOPEN_SOURCE is not. As _XOPEN_SOURCE cannot be enabled (see configure.in), we just work around by removing the hz definition again. */ #undef hz #endif Regards, Martin Commenting out the section in configure(.in) did not cause it to work. It still ended up with '100_encode' complaint. Using '#undef hz' in ./Modules/cjkcodecs/_codecs_cn.c does cause it to compile. However, it will not pass ./Lib/test/test_codecsencoding_cn.py or ./Lib/test/test_codecmaps_cn.py. The others (_hk, _jp, _kr, and _tw) do pass the test. I also note that compiles occurring after the complaint about not finding Tcl/Tk do not appear to get the OPT= setting I specified on the 'make' command line. It starts with compilation of structmodule.c and includes the _codecs_??.c files. Does this have any significance? Is it possible that there are other settings not being used? $ python test_codecencodings_cn.py test_chunkcoding (__main__.Test_GB2312) ... ERROR test_customreplace (__main__.Test_GB2312) ... ERROR test_errorhandle (__main__.Test_GB2312) ... ERROR test_streamreader (__main__.Test_GB2312) ... ERROR test_streamwriter (__main__.Test_GB2312) ... ERROR test_xmlcharrefreplace (__main__.Test_GB2312) ... ERROR test_chunkcoding (__main__.Test_GBK) ... ERROR test_customreplace (__main__.Test_GBK) ... ERROR test_errorhandle (__main__.Test_GBK) ... ERROR test_streamreader (__main__.Test_GBK) ... ERROR test_streamwriter (__main__.Test_GBK) ... ERROR test_xmlcharrefreplace (__main__.Test_GBK) ... ERROR test_chunkcoding (__main__.Test_GB18030) ... ERROR test_customreplace (__main__.Test_GB18030) ... ERROR test_errorhandle (__main__.Test_GB18030) ... ERROR test_streamreader (__main__.Test_GB18030) ... ERROR test_streamwriter (__main__.Test_GB18030) ... ERROR test_xmlcharrefreplace (__main__.Test_GB18030) ... ERROR == ERROR: test_chunkcoding (__main__.Test_GB2312) -- Traceback (most recent call last): File /home/pwatson/usr/lib/python2.4/test/test_multibytecodec_support.py, line 27, in setUp self.codec = codecs.lookup(self.encoding) LookupError: unknown encoding: gb2312 == ERROR: test_customreplace (__main__.Test_GB2312) -- Traceback (most recent call last): File /home/pwatson/usr/lib/python2.4/test/test_multibytecodec_support.py, line 27, in setUp self.codec = codecs.lookup(self.encoding) LookupError: unknown encoding: gb2312 == ERROR: test_errorhandle (__main__.Test_GB2312) -- Traceback (most recent call last): File /home/pwatson/usr/lib/python2.4/test/test_multibytecodec_support.py, line 27, in setUp self.codec = codecs.lookup(self.encoding) LookupError: unknown encoding: gb2312 == ERROR: test_streamreader (__main__.Test_GB2312) -- Traceback (most recent call last): File /home/pwatson/usr/lib/python2.4/test/test_multibytecodec_support.py, line 27, in setUp self.codec = codecs.lookup(self.encoding) LookupError: unknown encoding: gb2312 == ERROR: test_streamwriter (__main__.Test_GB2312) -- Traceback (most recent call last): File /home/pwatson
Re: 2.4.2 on AIX 4.3 make fails on threading
Neal Norwitz wrote: Paul Watson wrote: When I try to build 2.4.2 on AIX 4.3, it fails on missing thread objects. I ran ./configure --without-threads --without-gcc. Before using --without-threads I had several .pthread* symbols missing. Perhaps you need to add -lpthread to the link line. This should be able to work. What is the link line output from make? Can anyone suggest a configuration or some change that I can make to cause this to build correctly? Thanks. ld: 0711-317 ERROR: Undefined symbol: ._PyGILState_NoteThreadState I think that problem has been fixed. Try downloading this file and replace the one in your build directory: http://svn.python.org/projects/python/branches/release24-maint/Python/pystate.c Thanks for your help. I think it worked better after I read the Misc/AIX-NOTES document. Apparently one -must- use --with-threads. I grabbed a bzlib.h from the net and created ./Modules/bzlib.h since I do not have root access. I had to change bz2module.c #include to use quotes rather than symbols so that it would find the header file. Another problem with building _codecs_cn.c I will put in another subject. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
2.4.2 on AIX fails compiling _codecs_cn.c
Any ideas why ./Modules/cjkcodecs/_codecs_cn.c fails to compile? It
appears that the CODEC_STATELESS macro is concatenating 'hz' with a
number and text.
building '_codecs_cn' extension
cc -DNDEBUG -O -I. -I/home/pwatson/src/python/Python-2.4.2/./Include
-I/home/pwatson/src/python/Python-2.4.2/Include
-I/home/pwatson/src/python/Python-2.4.2 -c
/home/pwatson/src/python/Python-2.4.2/Modules/cjkcodecs/_codecs_cn.c -o
build/temp.aix-4.3-2.4/_codecs_cn.o
/home/pwatson/src/python/Python-2.4.2/Modules/cjkcodecs/_codecs_cn.c,
line 431.3: 1506-206 (S) Suffix of integer constant 100_encode is not valid.
/home/pwatson/src/python/Python-2.4.2/Modules/cjkcodecs/_codecs_cn.c,
line 431.3: 1506-196 (W) Initialization between types int(*)(union
{...}*,const void*,const unsigned short**,unsigned long,unsigned
char**,unsigned long,int) and int is not allowed.
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Re: 2.4.2 on AIX fails compiling _codecs_cn.c
Martin v. Löwis wrote: Paul Watson wrote: Any ideas why ./Modules/cjkcodecs/_codecs_cn.c fails to compile? It appears that the CODEC_STATELESS macro is concatenating 'hz' with a number and text. More likely, hz is already defined to be 100, then forming 100_encode. It would be best if you could find out what AIX header file defines hz to be 100, and whether there is any way to supress that definition. Regards, Martin This is on AIX 4.3.3 $ grep -i _hz $(find . -name m_param.h) #define _HZ 100/* ticks per second of the clock*/ #define __hzHZ /* Berkeley uses lower case hz */ #define HZ _HZ #define hz __hz $ cc_r 21|head -1 VisualAge C++ Professional / C for AIX Compiler, Version 5 -- http://mail.python.org/mailman/listinfo/python-list
Re: 2.4.2 on AIX fails compiling _codecs_cn.c
Martin v. Löwis wrote: Paul Watson wrote: Any ideas why ./Modules/cjkcodecs/_codecs_cn.c fails to compile? It appears that the CODEC_STATELESS macro is concatenating 'hz' with a number and text. More likely, hz is already defined to be 100, then forming 100_encode. It would be best if you could find out what AIX header file defines hz to be 100, and whether there is any way to supress that definition. Regards, Martin Here are the /usr/include/*.h files that include sys/m_param.h $ grep sys/m_param $(find . -name *.h) ./sys/pthdebug.h:#include sys/m_param.h /* _NGPRS, _NFPRS */ ./sys/context.h:#include sys/m_param.h ./sys/mstsave.h:#include sys/m_param.h/* for machine dependent defines*/ ./sys/param.h:#include sys/m_param.h ./sys/proc.h:#include sys/m_param.h ./sys/sched.h:#include sys/m_param.h Can we #undef _ALL_SOURCE for _codecs_cn.c compilation? There is a description in sys/context.h that seems to suggest that it is an internal vs. external definition issue. +44 /* +45 * XPG4.2 requires structures and structure elements to be defined such +46 * that they do not pollute the namespace. _ALL_SOURCE contains the +47 * kernel version, while not _ALL_SOURCE contains the sanitized versions. +48 */ -- http://mail.python.org/mailman/listinfo/python-list
Re: 2.4.2 on AIX fails compiling _codecs_cn.c
Martin v. Löwis wrote:
Paul Watson wrote:
Can we #undef _ALL_SOURCE for _codecs_cn.c compilation?
Where does _ALL_SOURCE come from? Why is it defined?
What is its effect on hz?
Regards,
Martin
Martin v. Löwis wrote:
Paul Watson wrote:
Can we #undef _ALL_SOURCE for _codecs_cn.c compilation?
Where does _ALL_SOURCE come from? Why is it defined?
What is its effect on hz?
Regards,
Martin
It appears that _ALL_SOURCE gets defined in the /usr/include/standards.h
file. If we could #define _ANSI_C_SOURCE or _POSIX_SOURCE, it appears
that it would eleminate _ALL_SOURCE.
$ cat t.c
#include stdio.h
#include stdlib.h
int main()
{
printf(hello, world\n);
#ifdef _ALL_SOURCE
printf(hello, again\n);
#endif
exit(0);
}
$ cc_r t.c
$ ./a.out
hello, world
hello, again
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2.4.2 on AIX 4.3 make fails on threading
When I try to build 2.4.2 on AIX 4.3, it fails on missing thread objects. I ran ./configure --without-threads --without-gcc. Before using --without-threads I had several .pthread* symbols missing. I do not have to have threading on this build, but it would be helpful if it is possible. The machine has the IBM C compiler. Can anyone suggest a configuration or some change that I can make to cause this to build correctly? Thanks. $ xlc 21|head -1 VisualAge C++ Professional / C for AIX Compiler, Version 5 ./Modules/makexp_aix Modules/python.exp . libpython2.4.a; c++ -Wl,-bE:Modules/python.exp -lld -o python Modules/python.o libpython2.4.a -ldl-lm collect2: ld returned 8 exit status ld: 0711-317 ERROR: Undefined symbol: ._PyGILState_NoteThreadState ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information. make: 1254-004 The error code from the last command is 1. Stop. -- http://mail.python.org/mailman/listinfo/python-list
Re: Web-based client code execution
Robin Becker wrote: Paul Watson wrote: .. -- David This looks interesting, but looks even more fragile than CrackAJAX. http://www.aminus.org/blogs/index.php/phunt/2005/10/06/subway_s_new_ajax_framework All of this comes down to Javascript which will still not allow me to read local, client files. Right? I think reading files is easy; just get the client browser to submit a form with the file as an upload. Hard part is getting the path(s) right. I need to walk the directory tree to find which files are of interest. It sounds like a client application (not browser) will be required. -- http://mail.python.org/mailman/listinfo/python-list
Re: Web-based client code execution
Kent Johnson wrote: Stephen Kellett wrote: In message [EMAIL PROTECTED], Steve [EMAIL PROTECTED] writes AJAX works because browsers can execute javascript. I don't know of a browser that can execute python. Basically your stuck with java or javascript because everything else really isn't cross platform. ActiveState do a version of Python that can run in a script tag like JavaScript and VBScript. This requires Windows Scripting Host. They also do a similar thing for Perl, not sure about TCL. See http://groups.google.com/group/comp.lang.python/msg/2d34acee66b40830 Kent Please correct my misunderstanding if I am wrong, but I thought that this runs server-side only and requires Microsoft IIS as the httpd server. Is that correct? -- http://mail.python.org/mailman/listinfo/python-list
Re: Web-based client code execution
David Wahler wrote: Steve wrote: AJAX works because browsers can execute javascript. I don't know of a browser that can execute python. Basically your stuck with java or javascript because everything else really isn't cross platform Don't jump to conclusions... http://dwahler.ky/python/ If you really, really want Python in a browser, it's certainly possible. :) -- David This looks interesting, but looks even more fragile than CrackAJAX. http://www.aminus.org/blogs/index.php/phunt/2005/10/06/subway_s_new_ajax_framework All of this comes down to Javascript which will still not allow me to read local, client files. Right? -- http://mail.python.org/mailman/listinfo/python-list
Re: Web-based client code execution
John J. Lee wrote: Paul Watson [EMAIL PROTECTED] writes: What are the options? The user to hits a web page, downloads code (Python I hope), execute it, and be able to return the results. It needs to be able to go through standard HTTP so that it could be run from behind a corporate firewall without any other ports being opened. Am I stuck doing an ActiveX control? [...] If you just need to talk on port 80, just go ahead and do that (module socket, module httplib, module urllib2, urllib.getproxies, etc), and write a normal desktop application. If it must run in a browser, here is some food for thought: Compile Python to JavaScript -- very cool http://www.aminus.org/blogs/index.php/phunt/2005/10/06/subway_s_new_ajax_framework http://www.aminus.org/blogs/index.php/phunt/2005/10/09/psst_crackajax_is_in_svn Plain old AJAX with Python on server side https://sourceforge.net/projects/json-py/ http://www.google.co.uk/search?q=ajax+pythonbtnG=Search (um, ignore the 1st result) Write Java applets in Python http://www.jython.org/ Flash 'local storage' http://www.macromedia.com/support/documentation/en/flashplayer/help/help02.html Sort-of AJAX-for-Flash stuff http://www.cs.unc.edu/~parente/tech/tr04.shtml http://www.simonf.com/flap/ Flash itself (boo;-) http://www.macromedia.com/ XUL and PyXPCOM (Firefox only) http://www.xulplanet.com/ http://trac.nunatak.com.au/projects/nufox Firefox future capabilities in this direction (probably most of this is relevant) http://www.mozilla.org/roadmap/gecko-1.9-roadmap.html http://weblogs.mozillazine.org/roadmap/archives/2005_09.html John I appreciate your long list of references. For this task, I think the first answer may have to be the one with which to go. A standard application that talks through port 80 and perhaps can use proxies. My desire to have the code distributed through a web page is just to ensure that the user is running the correct version and has not hacked it in any way. I suppose I can checksum the local client application and compare it with what is on the server. Then, make a way to update... ARGH! Even when future browsers embed Python interpreters, the security considerations may be such that no one will want to accept code which can do much locally anyway. Probably the right thing for the public Internet, Makes it harder to develop internal system management tools. -- http://mail.python.org/mailman/listinfo/python-list
Web-based client code execution
What are the options? The user to hits a web page, downloads code (Python I hope), execute it, and be able to return the results. It needs to be able to go through standard HTTP so that it could be run from behind a corporate firewall without any other ports being opened. Am I stuck doing an ActiveX control? Yes, I know that downloading code and executing on the client machine is a security risk. This will be for the employee's computers to connect. This will not be a publicly available web page. I have read some about AJAX. Is there an APAX coming for Python? -- http://mail.python.org/mailman/listinfo/python-list
Re: Web-based client code execution
Steve wrote: AJAX works because browsers can execute javascript. I don't know of a browser that can execute python. Basically your stuck with java or javascript because everything else really isn't cross platform. Well, I guess the Grail browser could run Python, but I do not think I can go there. I need READ access to the users local disk storage. Can I do this in Javascript, or should I bite the bullet and turn to ActiveX? -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python worth it??
Simon Brunning wrote: On 14/11/05, john boy [EMAIL PROTECTED] wrote: I have started out trying to learn Python for my first programming language. I am starting off with the book how to think like a computer scientist. I spend about 4-5 hrs a day trying to learn this stuff. It is certainly no easy task. I've been at it for about 1-2 weeks now and have a very elementary picture of how Python works. I am teaching myself from home and only recieve help from this forum. Can anybody give me a timeframe as to how long it usually takes to pick something like this up, so I can maybe figure out a way to pace myself? I can dedicate a good amount of time to it everyday. Any advice on what is the best way to learn Python? I am a fairly educated individual with a natural sciences degree (forestry), so I also have a decent math background. Are there any constraints mathematically or logic wise that would prevent me from building a firm grasp of this language? Keep at it. Everyone is different, so don't worry about how long it takes you vs. how long others might take. If you have no programming background, there's a lot to learn. Using Python is a good choice, I think, 'cos it gets a lot of extranious crud that many other languages insist on out of your way, but there's still a lot to learn. The best way to learn? Go through the tutorials - but if you get an idea for a mini-project of your own, don't be afraid to dive off and give it a go. Try to solve you own problems for a while, 'cos that's a valuable skill, but don't get to the point of frustration. Ask for help here or on the tutor mailing list[1]. And have fun. [1] http://mail.python.org/mailman/listinfo/tutor -- Cheers, Simon B, [EMAIL PROTECTED], http://www.brunningonline.net/simon/blog/ Python is a great choice for a first language. I agree with the tutorial recommendations of others. I would suggest that you focus on getting out of it what you want out of it. Get some data about rainfall and correlate it with regional fires, economic output, or religious practices. That will get you reading data, calculating, and writing output. Read more code than you write. Download the Python sources and unpackage them on your machine. You do not have to build the executable. Lot's of the Python library functions are written in Python. Try to explain what the code is doing. If you do not yet understand (after applying due diligence and using Google), then ask questions. Questions are good. Questions are our friend. Write as much code as you can. Get comfortable with a debugger where you can watch the action happen. There are many fundamental computer concepts such as memory, storage, persistence, threading, and all that. Do not worry about understanding these in the first few weeks. Focus on getting out of it something that you want. Understanding the concepts will come to you as you are a practitioner. -- http://mail.python.org/mailman/listinfo/python-list
Re: Newb ?
Chad Everett wrote: Hello all, Have a problem here with a challenge from a book I am reading. Any help is much appreciated. I am trying to run a program that asks the user for a statement and then prints it out backwards. this is what I have. It does not print anything out. I assume that I have something out of whack with my high and low statements. Thanks for you help. print \n\nWelcome to the Backwards Message Display. print message = raw_input(\nPlease Enter a Message.) high = len(message) low = -len(message) print print message[high:low] print print raw_input(Please Press Enter to Exit) Are you sure that this is not a class assignment? You can search the messages here for the answer. -- http://mail.python.org/mailman/listinfo/python-list
Re: Installing tkinter with Python 2.4.2 on FC4
Paul Watson wrote: I cannot yet get tkinter working on 2.4.2. I have installed the tk rpms from FC4. I have checked to see that TKPATH is available in Modules/Setup. How can I verify that I have tcl/tk installed correctly and it is the correct version (8+)? Surely, there must be a better way to do this than what I ended up doing. Please respond so that someone will do better than I did. To get this to work, I whacked the ./Modules/Setup file references to tk things. Two lines were changed from /usr/local/* to /usr/*. The X11 lines were simply uncommented. I had to install a few more RPMs from the FC4 CDs for tk and tcl. That led to installing some more xorg-x11 RPMs. After that, ./configure; make clean; make; make test; # *** Always uncomment this (leave the leading underscore in!): _tkinter _tkinter.c tkappinit.c -DWITH_APPINIT \ # *** Uncomment and edit to reflect where your Tcl/Tk libraries are: # -L/usr/local/lib \ -L/usr/lib \ # *** Uncomment and edit to reflect where your Tcl/Tk headers are: # -I/usr/local/include \ -I/usr/include \ # *** Uncomment and edit to reflect where your X11 header files are: -I/usr/X11R6/include \ # *** Or uncomment this for Solaris: # -I/usr/openwin/include \ # *** Uncomment and edit for Tix extension only: # -DWITH_TIX -ltix8.1.8.2 \ # *** Uncomment and edit for BLT extension only: # -DWITH_BLT -I/usr/local/blt/blt8.0-unoff/include -lBLT8.0 \ # *** Uncomment and edit for PIL (TkImaging) extension only: # (See http://www.pythonware.com/products/pil/ for more info) # -DWITH_PIL -I../Extensions/Imaging/libImaging tkImaging.c \ # *** Uncomment and edit for TOGL extension only: # -DWITH_TOGL togl.c \ # *** Uncomment and edit to reflect your Tcl/Tk versions: # -ltk8.2 -ltcl8.2 \ -ltk8.4 -ltcl8.4 \ # *** Uncomment and edit to reflect where your X11 libraries are: -L/usr/X11R6/lib \ # *** Or uncomment this for Solaris: # -L/usr/openwin/lib \ # *** Uncomment these for TOGL extension only: # -lGL -lGLU -lXext -lXmu \ # *** Uncomment for AIX: # -lld \ # *** Always uncomment this; X11 libraries to link with: -lX11 -- http://mail.python.org/mailman/listinfo/python-list
Installing tkinter with Python 2.4.2 on FC4
I cannot yet get tkinter working on 2.4.2. I have installed the tk rpms from FC4. I have checked to see that TKPATH is available in Modules/Setup. How can I verify that I have tcl/tk installed correctly and it is the correct version (8+)? -- http://mail.python.org/mailman/listinfo/python-list
Re: Scanning a file
Paul Rubin wrote: [EMAIL PROTECTED] (John J. Lee) writes: Closing off this particular one would make it harder to get benefit of non-C implementations of Python, so it has been judged not worth it. I think I agree with that judgement. The right fix is PEP 343. I am sure you are right. However, PEP 343 will not change the existing body of Python source code. Nor will it, alone, change the existing body of Python programmers who are writing code which does not close files. -- http://mail.python.org/mailman/listinfo/python-list
Re: Scanning a file
Alex Martelli wrote:
Steve Holden [EMAIL PROTECTED] wrote:
...
The runtime knows it is doing it. Please allow the runtime to tell me
what it knows it is doing. Thanks.
In point oif fact I don't believe the runtime does any such thing
(though I must admit I haven't checked the source, so you may prove me
wrong).
As far as I know, Python simply relies on the opreating system to close
files left open at the end of the program.
Nope, see
http://cvs.sourceforge.net/viewcvs.py/python/python/dist/src/Objects/fi
leobject.c?rev=2.164.2.3view=markup :
static void
file_dealloc(PyFileObject *f)
{
int sts = 0;
if (f-weakreflist != NULL)
PyObject_ClearWeakRefs((PyObject *) f);
if (f-f_fp != NULL f-f_close != NULL) {
Py_BEGIN_ALLOW_THREADS
sts = (*f-f_close)(f-f_fp);
etc.
Exactly how the OP wants to allow the runtime to tell [him] what it
knows it is doing, that is not equivalent to reading the freely
available sources of that runtime, is totally opaque to me, though.
The runtime (implementation of built-in object type `file`) could be
doing or not doing a bazillion things (in its ..._dealloc function as
well as many other functions), up to and including emailing the OP's
cousin if it detects the OP is up later than his or her bedtime -- the
language specs neither mandate nor forbid such behavior. How, exactly,
does the OP believe the language specs should allow (presumably,
REQUIRE) ``the runtime'' to communicate the sum total of all that it's
doing or not doing (beyond whatever the language specs themselves may
require or forbid it to do) on any particular occasion...?!
Alex
The OP wants to know which files the runtime is closing automatically.
This may or may not occur on other or future Python implementations.
Identifying this condition will accelerate remediation efforts to avoid
the deleterious impact of failure to close().
The mechanism to implement such a capability might be similar to the -v
switch which traces imports, reporting to stdout. It might be a
callback function.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Scanning a file
Alex Martelli wrote: ... gc.garbage [__main__.a object at 0x64cf0, __main__.b object at 0x58510] So, no big deal -- run a gc.collect() and parse through gc.garbage for any instances of your wrapper of file class, and you'll find ones that were forgotten as part of a cyclic garbage loop and you can check whether they were explicitly closed or not. Alex Since everyone needs this, how about building it in such that files which are closed by the runtime, and not user code, are reported or queryable? Perhaps a command line switch to either invoke or suppress reporting them on exit. Is there any facility for another program to peer into the state of a Python program? Would this be a security problem? -- http://mail.python.org/mailman/listinfo/python-list
Re: Scanning a file
Steve Holden wrote: Since everyone needs this, how about building it in such that files which are closed by the runtime, and not user code, are reported or queryable? Perhaps a command line switch to either invoke or suppress reporting them on exit. This is a rather poor substitute from correct program design and implementation. It also begs the question of exactly what constitutes a file. What about a network socket that the user has run makefile() on? What about a pipe to another process? This suggestion is rather ill-defined. Is there any facility for another program to peer into the state of a Python program? Would this be a security problem? It would indeed be a security problem, and there are enough of those already without adding more. regards Steve All I am looking for is the runtime to tell me when it is doing things that are outside the language specification and that the developer should have coded. How ill will things be when large bodies of code cannot run successfully on a future version of Python or a non-CPython implementation which does not close files. Might as well put file closing on exit into the specification. The runtime knows it is doing it. Please allow the runtime to tell me what it knows it is doing. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Controlling output using print with format string
It is clear that just using 'print' with variable names is relatively uncontrollable. However, I thought that using a format string would reign the problem in and give the desired output. Must I resort to sys.stdout.write() to control output? $ python Python 2.4.1 (#1, Jul 19 2005, 14:16:43) [GCC 4.0.0 20050519 (Red Hat 4.0.0-8)] on linux2 Type help, copyright, credits or license for more information. s = 'now is the time' for c in s: ... print c, ... n o w i s t h e t i m e for c in s: ... print %c % (c), ... n o w i s t h e t i m e for c in s: ... print %1c % (c), ... n o w i s t h e t i m e -- http://mail.python.org/mailman/listinfo/python-list
Re: Scanning a file
Fredrik Lundh wrote: Paul Watson wrote: This is Cyngwin on Windows XP. using cygwin to analyze performance characteristics of portable API:s is a really lousy idea. Ok. So, I agree. That is just what I had at hand. Here are some other numbers to which due diligence has also not been applied. Source code is at the bottom for both file and mmap process. I would be willing for someone to tell me what I could improve. $ python -V Python 2.4.1 $ uname -a Linux ruth 2.6.13-1.1532_FC4 #1 Thu Oct 20 01:30:08 EDT 2005 i686 $ cat /proc/meminfo|head -2 MemTotal: 514232 kB MemFree: 47080 kB $ time ./scanfile.py 16384 real0m0.06s user0m0.03s sys 0m0.01s $ time ./scanfilemmap.py 16384 real0m0.10s user0m0.06s sys 0m0.00s Using a ~ 250 MB file, not even half of physical memory. $ time ./scanfile.py 16777216 real0m11.19s user0m10.98s sys 0m0.17s $ time ./scanfilemmap.py 16777216 real0m55.09s user0m43.12s sys 0m11.92s == $ cat scanfile.py #!/usr/bin/env python import sys fn = 't.dat' ss = '\x00\x00\x01\x00' ss = 'time' be = len(ss) - 1# length of overlap to check blocksize = 64 * 1024# need to ensure that blocksize overlap fp = open(fn, 'rb') b = fp.read(blocksize) count = 0 while len(b) be: count += b.count(ss) b = b[-be:] + fp.read(blocksize) fp.close() print count sys.exit(0) === $ cat scanfilemmap.py #!/usr/bin/env python import sys import os import mmap fn = 't.dat' ss = '\x00\x00\x01\x00' ss='time' fp = open(fn, 'rb') b = mmap.mmap(fp.fileno(), os.stat(fp.name).st_size, access=mmap.ACCESS_READ) count = 0 foundpoint = b.find(ss, 0) while foundpoint != -1 and (foundpoint + 1) b.size(): #print foundpoint count = count + 1 foundpoint = b.find(ss, foundpoint + 1) b.close() print count fp.close() sys.exit(0) -- http://mail.python.org/mailman/listinfo/python-list
Re: Scanning a file
Mike Meyer [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Paul Watson [EMAIL PROTECTED] writes: ... Did you do timings on it vs. mmap? Having to copy the data multiple times to deal with the overlap - thanks to strings being immutable - would seem to be a lose, and makes me wonder how it could be faster than mmap in general. The only thing copied is a string one byte less than the search string for each block. I did not do due dilligence with respect to timings. Here is a small dataset read sequentially and using mmap. $ ls -lgG t.dat -rw-r--r-- 1 16777216 Oct 28 16:32 t.dat $ time ./scanfile.py 1048576 0.80s real 0.64s user 0.15s system $ time ./scanfilemmap.py 1048576 20.33s real 6.09s user14.24s system With a larger file, the system time skyrockets. I assume that to be the paging mechanism in the OS. This is Cyngwin on Windows XP. $ ls -lgG t2.dat -rw-r--r-- 1 268435456 Oct 28 16:33 t2.dat $ time ./scanfile.py 16777216 28.85s real16.37s user 0.93s system $ time ./scanfilemmap.py 16777216 323.45s real94.45s user 227.74s system -- http://mail.python.org/mailman/listinfo/python-list
Re: Scanning a file
Alex Martelli [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] In today's implementations of Classic Python, yes. In other equally valid implementations of the language, such as Jython, IronPython, or, for all we know, some future implementation of Classic, that may well not be the case. Many, quite reasonably, dislike relying on a specific implementation's peculiarities, and prefer to write code that relies only on what the _language_ specs guarantee. How could I identify when Python code does not close files and depends on the runtime to take care of this? I want to know that the code will work well under other Python implementations and future implementations which may not have this provided. -- http://mail.python.org/mailman/listinfo/python-list
Re: Scanning a file
[EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I want to scan a file byte for byte for occurences of the the four byte pattern 0x0100. I've tried with this: # start import sys numChars = 0 startCode = 0 count = 0 inputFile = sys.stdin while True: ch = inputFile.read(1) numChars += 1 if len(ch) 1: break startCode = ((startCode 8) 0x) | (ord(ch)) if numChars 4: continue if startCode == 0x0100: count = count + 1 print count # end But it is very slow. What is the fastest way to do this? Using some native call? Using a buffer? Using whatever? /David How about something like: #!/usr/bin/env python import sys fn = 't.dat' ss = '\x00\x00\x01\x00' be = len(ss) - 1# length of overlap to check blocksize = 4 * 1024# need to ensure that blocksize overlap fp = open(fn, 'rb') b = fp.read(blocksize) found = 0 while len(b) be: if b.find(ss) != -1: found = 1 break b = b[-be:] + fp.read(blocksize) fp.close() sys.exit(found) -- http://mail.python.org/mailman/listinfo/python-list
Re: Scanning a file
[EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I want to scan a file byte for byte for occurences of the the four byte pattern 0x0100. I've tried with this: # start import sys numChars = 0 startCode = 0 count = 0 inputFile = sys.stdin while True: ch = inputFile.read(1) numChars += 1 if len(ch) 1: break startCode = ((startCode 8) 0x) | (ord(ch)) if numChars 4: continue if startCode == 0x0100: count = count + 1 print count # end But it is very slow. What is the fastest way to do this? Using some native call? Using a buffer? Using whatever? /David Here is an attempt at counting and using the mmap facility. There appear to be some serious backward compatibility issues. I tried Python 2.1 on Windows and AIX and had some odd results. If you are 2.4.1 or higher that should not be a problem. #!/usr/bin/env python import sys import os import mmap fn = 't.dat' ss = '\x00\x00\x01\x00' fp = open(fn, 'rb') b = mmap.mmap(fp.fileno(), os.stat(fp.name).st_size, access=mmap.ACCESS_READ) count = 0 foundpoint = b.find(ss, 0) while foundpoint != -1 and (foundpoint + 1) b.size(): count = count + 1 foundpoint = b.find(ss, foundpoint + 1) b.close() print count fp.close() sys.exit(0) -- http://mail.python.org/mailman/listinfo/python-list
Re: Scanning a file
Paul Watson [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I want to scan a file byte for byte for occurences of the the four byte pattern 0x0100. I've tried with this: # start import sys numChars = 0 startCode = 0 count = 0 inputFile = sys.stdin while True: ch = inputFile.read(1) numChars += 1 if len(ch) 1: break startCode = ((startCode 8) 0x) | (ord(ch)) if numChars 4: continue if startCode == 0x0100: count = count + 1 print count # end But it is very slow. What is the fastest way to do this? Using some native call? Using a buffer? Using whatever? /David Here is a better one that counts, and not just detects, the substring. This is -much- faster than using mmap; especially for a large file that may cause paging to start. Using mmap can be -very- slow. #!/usr/bin/env python import sys fn = 't2.dat' ss = '\x00\x00\x01\x00' be = len(ss) - 1# length of overlap to check blocksize = 64 * 1024# need to ensure that blocksize overlap fp = open(fn, 'rb') b = fp.read(blocksize) count = 0 while len(b) be: count += b.count(ss) b = b[-be:] + fp.read(blocksize) fp.close() print count sys.exit(0) -- http://mail.python.org/mailman/listinfo/python-list
Re: Installing Python at Work
Nikola [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I'm currently learning Python for my own use. I'm considering installing it on a work laptop, knowing that it is non-licensed, distributable software. However, does it access communication ports? I know the company checks their ports regularly for activity. I won't be doing anything very serious; I'm just trying out Python, learning the basics from 'Learning Python' by O'Reilly. Are you asking if it is ok to install Python on your company machine or if Python does anything that might cause you to get caught doing something the company has already said not to do? -- http://mail.python.org/mailman/listinfo/python-list
Re: piping out binaries properly
Andy Leszczynski leszczynscyATnospam.yahoo.com.nospam wrote in message news:[EMAIL PROTECTED] I have got following program: import sys import binascii from string import * sys.stdout.write(binascii.unhexlify(41410A4141)) when I run under Unix I got: $ python u.py u.bin $ od -t x1 u.bin 000 41 41 0a 41 41 and under Windows/Cygwin following: $ python u.py u.bin $ od -t x1 u.bin 000 41 41 0d 0a 41 41 006 The question is how can I pipe out binary content properly and platform independently? A. try: import msvcrt, os msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY) except: pass -- http://mail.python.org/mailman/listinfo/python-list
