What tools are good to use for code analysis in python? I have a large source repository split across multiple projects, and I would like to be able to run tools across the directories to see details like Cyclomatic Complexity, and perhaps be able to spot errors using static analysis. Ideally, I would like to be able to produce a repor...
How to wait for multiple child processes in Python on Windows, without active wait (polling)? Something like this almost works for me: proc1 = subprocess.Popen(['python','mytest.py']) proc2 = subprocess.Popen(['python','mytest.py']) proc1.wait() print "1 finished" proc2.wait() print "2 finished" The problem is that when proc2 fini...
I seen several examples of code like this: if not someobj: #do something But I'm wondering why not do: if someobj == None: #do something Is there any difference? Does one have an advantage over the other? ...
I have a C extension module and it would be nice to distribute built binaries. Setuptools makes it easy to build extensions modules on OS X and GNU/Linux, since those OSs come with GCC, but I don't know how to do it in Windows. Would I need to buy a copy of Visual Studio, or does Visual Studio Express work? Can I just use Cygwin or MinG...
How do I read text from the (windows) clipboard from python? ...
In Python there is a really neat function called zip which can be used to iterate through two lists at the same time: list1 = [1, 2, 3] list2 = ["a", "b", "c"] for v1, v2 in zip(list1, list2): print v1 + " " + v2 The above code shoul produce the following: 1 a 2 b 3 c I wonder if there is a method like it available in .Net? I'm ...
What are the lesser-known but useful features of the Python programming language? Try to limit answers to Python core. One feature per answer. Give an example and short description of the feature, not just a link to documentation. Label the feature using a title as the first line. ...
For IronPython there is a project - IronClad, that aims to transparently run C extensions in it. Is there a similiar project for Jython? ...
i need to write a module to detect similar documents. i have read many papers of fingerprints of documents technique and others but i do not know how to write code or implement. the algorithm should work for Chinese, Japanese, English and German language or language independent. can you help me. or sending me code for this problem i am ...
I have a Google App Engine app - http://mylovelyapp.appspot.com/ It has a page - mylovelypage For the moment, the page just does self.response.out.write('OK') If I run the following Python at my computer: import urllib2 f = urllib2.urlopen("http://mylovelyapp.appspot.com/mylovelypage") s = f.read() print s f.close() it prints "OK" ...
I like the Android platform. Actually, with some friends, we even participate to the ADC with the Spoxt project. But Java is not my favourite language at all. We are working on a S60 version and this platform has a nice Python API. Of course there is nothing official about Python on Android, but since Jython exists, does anybody know a ...
I am trying to sort a dict based on its key and return an iterator to the values from within an overridden iter method in a class. Is there a nicer and more efficient way of doing this than creating a new list, inserting into the list as I sort through the keys? ...
I'm starting to learn Python and I've come across generator functions, those that have a yield statement in them. I want to know what types of problems that these functions are really good at solving. ...
List Comprehension for me seems to be like the opaque block of granite that regular expressions are for me. I need pointers. Say, I have a 2D list: li = [[0,1,2],[3,4,5],[6,7,8]] I would like to merge this either into one long list li2 = [0,1,2,3,4,5,6,7,8] or into a string with separators: s = "0,1,2,3,4,5,6,7,8" Really, I'd l...
How do you generate all the permutations of a list in Python, independently of the type of elements in that list. For example: permutations ([]) [] permutations ([1,]) [1] permutations ([1,2]) [1, 2] [2, 1] permutations ([1,2,3]) [1, 2, 3] [1, 3, 2] [2, 1, 3] [2, 3, 1] [3, 1, 2] [3, 2, 1] EDIT: Eliben pointed to a solution that's...
In Python specifically, how do variables get shared between threads? Although I have used threading.Thread before I never really understood or saw examples of how variables got shared. Are they shared between the main thread and the children or only among the children? When would I need to use thread local storage to avoid this sharing...
If you are relying on an implementation of Python that has a Global Interpreter Lock (i.e. CPython) and writing multithreaded code, do you really need locks at all? If the GIL doesn't allow multiple instructions to be executed in parallel, wouldn't shared data be unnecessary to protect? sorry if this is a dumb question, but it is somet...
I'm about to put a beta version of the site I'm working on up on the web. It needs to have a beta code to restrict access. The site is written in django. I don't want to change the fundamental Auth system to accommodate a beta code, and I don't care particularly that the security of the beta code is iron-clad, just that it's a significa...
I start by creating a string variable with some non-ascii utf-8 encoded data on it: >>> text = 'á' >>> text '\xc3\xa1' >>> text.decode('utf-8') u'\xe1' Using unicode() on it raises errors... >>> unicode(text) Traceback (most recent call last): File "<stdin>", line 1, in <module> UnicodeDecodeError: 'ascii' codec can't decode byte 0...
I need to package my python application, its dependencies and python into a single MSI installer. The end result should desirably be: Python is installed in the standard location the package and its dependencies are installed in a separate directory (possibly site-packages) the installation directory should contain the python uncompres...