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• How to test my GAE site for performance

  - by Sergey Basharov

  I am building a GAE site that uses AJAX/JSON for almost all its tasks including building the UI elements, all interactions and client-server requests. What is a good way to test it for highloads so that I could have some statistics about how much resources 1000 average users per some period of time would take. I think I can create some Python functions for this purpose. What can you advise? Thanks.

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• What is your favorite NumPy feature?

  - by Gökhan Sever

  Share your favourite NumPy features / tips & tricks. Please try to limit one feature per line. The question is posted in parallel at ask.scipy.org We welcome you to join the conversation there -with the main idea of collecting the Scientific Python related questions under one roof. Feel free to dual-post or post at your favourite site...

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• How to calculate network usage?

  - by Jake

  Hi all, How would i go about writing a python script that shows how much internet traffic there is ? Like showing bandwith usage? Thanks!

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• Counting vowels

  - by user74283

  Can anyone please tell me what is wrong with this script. I am a python newb but i cant seem to figure out what might be causing it not to function. def find_vowels(sentence): """ >>> find_vowels(test) e """ count = 0 vowels = "aeiuoAEIOU" for letter in sentence: if letter in vowels: count += 1 print count if __name__ == '__main__': import doctest doctest.testmod()

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• How to change last letter of filename to lowercase if it is a letter?

  - by Robert Buckley

  I have been given data which cannot be interpreted by my software unless it has a lowercase letter at the end. The data was delivered with an uppercase letter at the end. Somehow I need to first recursively loop through all folders and find whether the filename ends with a letter and then change it to lowercase. I think python could do this, but I don´t know how,. Any help would be great! yours, Rob

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• Pros/Cons of Django vs Pylons

  - by minty

  I'm begining a new webapp in Python. I've narrowed my choices down to Django and Pylons. What are the pros/cons of each?

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• Pros and Cons of oursql [closed]

  - by S.Mark

  According to this python page, oursql looks very cool. oursql has real parameterization. oursql allows text or binary data to be streamed into the database and streamed out of the database, instead of requiring everything to be buffered in the client. oursql can both insert rows lazily and fetch rows lazily. oursql has unicode support on by default. So, Anyone start using it in the live projects and could share pros and cons over it?

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• Which XML library for what purposes?

  - by John Mee

  A search for "python" and "xml" returns a variety of libraries for combining the two. This list probably faulty: xml.dom xml.etree xml.sax xml.parsers.expat PyXML beautifulsoup? HTMLParser htmllib sgmllib Be nice if someone can offer a quick summary of when to use which, and why.

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• is it possible to extract all PDFs from a site

  - by deming

  given a URL like www.mysampleurl.com is it possible to crawl through the site and extract links for all PDFs that might exist? I've gotten the impression that Python is good for this kind of stuff. but is this feasible to do? how would one go about implementing something like this? also, assume that the site does not let you visit something like www.mysampleurl.com/files/

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• Numpy array dimensions

  - by cristian

  Hello, I'm currently trying to learn Numpy and Python. Given the following array: import numpy as N a = N.array([[1,2],[1,2]]) Is there a function that returns the dimensions of a (e.g.a is a 2 by 2 array). size() returns 4 and that doesn't help very much. Thanks.

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• Important packages and modules not compatible with py2exe?

  - by EOL

  Are there major/common/important packages that py2exe cannot handle? I am currently studying the possibility of creating a .exe from a Python program that will use Tkinter, some Excel file reading module, NumPy, SciPy and matplotlib: is it realistic to try to achieve this with py2exe?

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• Java converting to Jython-Getting a class object within itself

  - by Bggreen

  I am attempting to convert Java code to Jython and am using the apache Log and LogFactory imports. I am attempting to emulate Foo.class in Jython The chunk of code is as follows: in Java import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public class MyClass { private static final Log log = LogFactory.getLog(MyClass.class); public MyClass(Document dom) { //code } How can I emulate this same behavior of MyClass.class in Jython/Python?

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• What is wrong with this SimPy installation?

  - by dmindreader

  Alright, I have tried a bunch of times the python setup.py install command from my command prompt, and this is what I'm getting: SCREEN And when trying this: from SimPy.Simulation import * on Idle, I get this: Traceback (most recent call last): File "C:/Python30/pruebas/prueba1", line 1, in <module> from SimPy.Simulation import * File "C:\Python30\SimPy\Simulation.py", line 320 print 'SimPy.Simulation %s' %__version__, ^ SyntaxError: invalid syntax >>>

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• Ubuntu quickly (python/gtk) - how to monitor stdin?

  - by neil

  I'm starting to work with Ubuntu's "quickly" framework, which is python/gtk based. I want to write a gui wrapper for a textmode C state-machine that uses stdin/stdout. I'm new to gtk. I can see that the python print command will write to the terminal window, so I assume I could redirect that to my C program's stdin. But how can I get my quickly program to monitor stdin (i.e. watch for the C program's stdout responses)? I suppose I need some sort of polling loop, but I don't know if/where that is supported within the "quickly" framework. Or is redirection not the way to go - should I be looking at something like gobject.spawn_async?

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• List comprehension for series of deltas

  - by Yuval A

  How would you write a list comprehension in python to generate a series of n-1 deltas between n items in an ordered list? Example: L = [5,9,2,1,7] RES = [5-9,9-2,2-1,1-7] = [4,7,1,6] # absolute values

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• Comments in XML at beginning of document

  - by wanderameise

  my python xml parser fails if there´s a comment at the beginnging of an xml file like:: <?xml version="1.0" encoding="utf-8"?> <!-- Script version: "1"--> <!-- Date: "07052010"--> ... is it illegal to place a comment like this?

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• Which implementation of OrderedDict should be used in python2.6?

  - by Jorge Vargas

  As some of you may know in python2.7/3.2 we'll get OrderedDict with PEP372 however one of the reason the PEP existed was because everyone did their own implementation and they were all sightly incompatible. So which one of the 8 current implementations link text is backwards compatible with the 2.7 odict from python 2.7 in a way we can start using that now and depend on 2.7 in a couple of months?

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• Programmatically determining the status of a file download

  - by Tim

  Is there a way I can programmatically determine the status of a download in Chrome or Mozilla Firefox? I would like to know if the download was aborted or completed successfully. For writing the code I'd be using either Perl, PHP or Python. Please help. Thank You.

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• Is it possible to renice a subprocess ?

  - by ramusus

  I know about os.nice() it works perfect for parent process, but I need to do renice of my child subprocesses. I found way to do this, but it seems to be not very handy and too excessive: os.system("renice -n %d %d" % ( new_nice, suprocess.pid ) ) And it isn't return resulting nice level after renicing. Is there more clean way to renice subprocesses in python?

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• How to convert SVG images for use with Pisa / XHTML2PDF?

  - by Nick Sergeant

  I'm using Pisa/XHTML2PDF to generate PDFs on the fly in Django. Unfortunately, I need to include SVG images as well, which I don't believe is an easy task. What's the best way to go about either a) converting the SVGs to PNG / JPG (in Python) or b) including SVGs in the PDF export from Pisa?

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• new to mac and textmate, can someone explain these shortcuts?

  - by Blankman

  I'm using textmate for the first time basically, and I am lost as to what keys map to these funny symbols. using python bundles, what keys do I press for: run run with tests run project unit tests Also, with textmate, do I actually define a project in textmate or do I just work on the files and textmate doesn't create its own .project type file ?

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• Decorator Module Standard

  - by Kyle Terry

  I was wondering if it's frowned upon to use the decorator module that comes with python. Should I be creating decorators using the original means or is it considered okay practice to use the module?

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• Get localized language name from locale code

  - by jack

  How can I get localized language name by specified locale code in python? For example: >> get_language_name('ja') >> ('Japanese', u'???')

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• working with django and sqlalchemy but backend mysql

  - by nazmul hasan

  i am working with python django framework but in model part is sqlalchemy and back end data base is mysql how i will configure them???

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• Is it possible to build exe on Vista and deploy on XP using py2exe

  - by dfens

  I have created some program using python on Windows Vista. But I want to deploy it on Windows XP. Is it necessary to make new build on windows XP? Or there is possibility to make build that will work on both of these systems? EDIT (EDIT 2 - very simple program does not work also): My setup: from distutils.core import setup import py2exe setup(console=['orderer.py']) Using dependency explorer i checked that dependencies are: msvcr90.dll kernel32.dll +ntdll.dll

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