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• How do I type a floating point infinity literal in python

  - by fmark

  How do I type a floating point infinity literal in python? I have heard inf = float('inf') is non portable. Thus, I have had the following recommended: inf = 1e400 Is either of these standard, or portable? What is best practice?

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• Looking for a python library to parse RRD databases

  - by jedberg

  I have an RRD database, and I want to parse some of the data in it. I found this: http://pypi.python.org/pypi/PyRRD/0.0.7 but it basically just calls the command line tools (no parsing). Does anyone know of a library that will actually parse the output of rrdtool dump? Thanks!

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• How to convert Selenese (html) to Python programmatically?

  - by dan

  How would I convert test cases made by Selenium IDE to Python without exporting every test case by hand? Is there any command line converter for that job? In the end I want to use Selenium RC and Pythons build in unittest to test my websites. Thanks a lot.

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• Python: get default gateway for a local interface/ip address in linux

  - by gnp

  On Linux, how can I find the default gateway for a local ip address/interface using python? I saw the question "How to get internal IP, external IP and default gateway for UPnP", but the accepted solution only shows how to get the local IP address for a network interface on windows. Thanks.

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• Search jpeg files using python

  - by Nims

  Hi, My requirement is to search for jpeg images files in a directory using python script and list the file names. Can anyone help me on how to identify jpeg images files. Thanks in advance...

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• Parsing a context-free grammar in Python

  - by Yuval A

  What tools are available in Python to assist in parsing a context-free grammar? Of course it is possible to roll my own, but I am looking for a generic tool that can generate a parser for a given CFG.

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• Python SUDS - problem with sending a message encoded not in UTF-8

  - by bartekb

  I need to send a SOAP message (with Python SUDS) with strings encoded in 'iso-8859-2'. Does anybody know how to do it? SUDS raises the following exception when I invoke a method on a client with parameters encoded in 'iso-8859-2': File "/home/bartek/myenv/lib/python2.5/site-packages/suds/sax/text.py", line 43, in __new__ result = super(Text, cls).__new__(cls, *args, **kwargs) UnicodeDecodeError: 'ascii' codec can't decode byte 0xc5 in position 10: ordinal not in range(128)

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• Should Python 2.6 on OS X deal with multiple easy-install.pth files in $PYTHONPATH?

  - by ahd

  I am running ipython from sage and also am using some packages that aren't in sage (lxml, argparse) which are installed in my home directory. I have therefore ended up with a $PYTHONPATH of $HOME/sage/local/lib/python:$HOME/lib/python Python is reading and processing the first easy-install.pth it finds ($HOME/sage/local/lib/python/site-packages/easy-install.pth) but not the second, so eggs installed in $HOME/lib/python aren't added to the path. On reading the off-the-shelf site.py, I cannot for the life of me see why it's doing this. Can someone enlighten me? Or advise how to nudge Python into reading both easy-install.pth files? Consolidating both into one .pth file is a viable workaround for now, so this question is mostly for curiosity value.

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• Iterating over Python list a slice at a time

  - by jrdioko

  I'd like to iterate over a list in Python several (say, 10) elements at a time, processing each slice one by one. I can think of a few ways to do this, but none seems obvious and clean. What is the most Pythonic way to do this?

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• Cross-platform way of getting temp directory in Python

  - by Joril

  Hi all, Is there a cross-platform way of getting the path to the temp directory in Python 2.6? For example, under Linux that would be /tmp, while under XP C:\Documents and settings\\[user]\Application settings\Temp. Thanks!

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• Game engine with python scripting?

  - by Kayle

  Looking to put together a 3D side-scrolling action platformer. Since this is my first time trying to put together a non-simple adventure game, I'm at a loss for which engine to consider. I would prefer one that supports scripting in python, since that's my primary language. Without tight controls, the game will suck... so speed is a priority. Cross-platform is also important to me. Any suggestions?

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• Set serial port pin high using python

  - by morph

  Hello, Is it possible to set one pin of the serial port continuesly high using python (or C)? If yes, how? Thanks in advance

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• getting Ceil() of Decimal in python?

  - by Gunjan

  Is there a way to get the ceil of a high precision Decimal in python? >>> import decimal; >>> decimal.Decimal(800000000000000000001)/100000000000000000000 Decimal('8.00000000000000000001') >>> math.ceil(decimal.Decimal(800000000000000000001)/100000000000000000000) 8.0 math rounds the value and returns non precise value

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• Python retrieving windows service information

  - by danspants

  Can python retrieve the name of the user that owns a windows service? I've had a fiddle with win32serviceutil but to no avail, nor can I find much documentation on it beyond starting and stopping services. Thanks!

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• Python, print delimited list

  - by Mike

  Consider this Python code for printing a list of comma separated values for element in list: print element + ",", What is the preferred method for printing such that a comma does not appear if element is the final element in the list. ex a = [1, 2, 3] for element in a print str(element) +",", output 1,2,3, desired 1,2,3

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• C++ like iterators in python?

  - by uberjumper

  This might be a really dumb question, however i've looked around online, etc. And have not seen a solid answer. What i was wondering, is there a simple way to do something like this? lines = open('something.txt', 'r').readlines() for line in lines: if line == '!': # force iteration forward twice line.next().next() <etc> Is there an easy way to do that in python?

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• Python directory list returned to Django template

  - by Shu

  Total Python newb here. I have a images directory and I need to return the names and urls of those files to a django template that I can loop through for links. I know it will be the server path, but I can modify it via JS. I've tried os.walk, but I keep getting empty results.

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• Google App Engine Python Unit Tests

  - by oneself

  Hi, I'd like to write some Python unit tests for my Google App Engine. How can I set that up? Does someone happen to have some sample code which shows how to write a simple test?

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• xml to Python data structure using lxml

  - by Samuel Taylor

  How can I convert xml to Python data structure using lxml? I have searched high and low but can't find anything.

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• running python from an android app

  - by Stacia

  Hi everyone, I am trying to run a python script through an application I've written. I found some pages which say that this piece of code is doing it, but I can't figure it out. http://code.google.com/p/android-scripting/source/browse/android/AndroidScriptingEnvironment/src/com/google/ase/locale/LocaleReceiver.java Can someone explain what is going on and how I can edit that to run an arbitrary script file in my project directory?

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• Removing right-to-left mark and other unicode characters from input in Python

  - by Earl Bellinger

  I am writing a forum in Python. I want to strip input containing the right-to-left mark and things like that. Suggestions? Possibly a regular expression?

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• emacs 23 hangs on python mode when typing string block """

  - by Gopalakrishnan Subramani

  My emacs hangs (Ubuntu 9 + emacs 23 + pyflakes) when I type """ quotes for string blocks. anybody experience the same problem? I think, it may not be the emacs problem but some python mode or pyflakes which I use it for error checking. Anybody hot around the issue? It really frustrating experience.

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• The confusion on python encoding

  - by zhangzhong

  I retrieved the data encoded in big5 from database,and I want to send the data as email of html content, the code is like this: html += """<tr><td>""" html += """unicode(rs[0], 'big5')""" # rs[0] is data encoded in big5 I run the script, but the error raised: UnicodeDecodeError: 'ascii' codec can't decode byte...... However, I tried the code in interactive python command line, there are no errors raised, could you give me the clue?

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• Memcache in python

  - by alex

  I want to memcache an xmldata using python,also needs to update the cache with the refreshed xmldata retreived from webserver,could any one help me with sample code.

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• python unittest howto

  - by zubin71

  I`d like to know how I could unit-test the following module. def download_distribution(url, tempdir): """ Method which downloads the distribution from PyPI """ print "Attempting to download from %s" % (url,) try: url_handler = urllib2.urlopen(url) distribution_contents = url_handler.read() url_handler.close() filename = get_file_name(url) file_handler = open(os.path.join(tempdir, filename), "w") file_handler.write(distribution_contents) file_handler.close() return True except ValueError, IOError: return False

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