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python Programming Glossary: whileWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python # it's the method that creates the object and returns it # while __init__ just initializes the object passed as parameter # you..
How to generate all permutations of a list in Python http://stackoverflow.com/questions/104420/how-to-generate-all-permutations-of-a-list-in-python cycles range n n r 1 yield tuple pool i for i in indices r while n for i in reversed range r cycles i 1 if cycles i 0 indices..
Remove items from a list while iterating in Python http://stackoverflow.com/questions/1207406/remove-items-from-a-list-while-iterating-in-python items from a list while iterating in Python I'm iterating over a list of tuples in..
Fastest way to list all primes below N in python http://stackoverflow.com/questions/2068372/fastest-way-to-list-all-primes-below-n-in-python questions. def get_primes n numbers set range n 1 1 primes while numbers p numbers.pop primes.append p numbers.difference_update.. 997 wheel 2 3 5 const 30 if N 2 return if N const pos 0 while __smallp pos N pos 1 return list __smallp pos # make the offsets.. k False # end of inner functions definition cpos const pos while prime stop # 30k 7 if tk7 pos prime cpos 7 p.append prime lastadded..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained And this is the caller result candidates list self while candidates node candidates.pop distance node._get_dist obj if.. candidates they contain only one element at the beginning while candidates # Get the last candidate and remove it from the list.. parts The loop iterates on a list but the list expands while the loop is being iterated It's a concise way to go through..
Is there any way to kill a Thread in Python? http://stackoverflow.com/questions/323972/is-there-any-way-to-kill-a-thread-in-python works is t ThreadWithExc ... ... t.raiseExc SomeException while t.isAlive time.sleep 0.1 t.raiseExc SomeException If the exception..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do time thread def myfunction string sleeptime lock args while 1 lock.acquire time.sleep sleeptime lock.release time.sleep..
How to improve performance of this code? http://stackoverflow.com/questions/4295799/how-to-improve-performance-of-this-code heuristicf formation node formation 0 None closedlist while 1 try f current openlist.get except IndexError current None.. None if solutionf current.arrangement path cp current while cp None path.append cp.arrangement cp cp.parent path.reverse..
What is the most “pythonic” way to iterate over a list in chunks? http://stackoverflow.com/questions/434287/what-is-the-most-pythonic-way-to-iterate-over-a-list-in-chunks be preserved. Perhaps something like this would be better while ints foo ints 0 ints 1 ints 2 ints 3 ints 0 4 Still doesn't..
How do you remove duplicates from a list in Python whilst preserving order? http://stackoverflow.com/questions/480214/how-do-you-remove-duplicates-from-a-list-in-python-whilst-preserving-order duplicates from a list so that all elements are unique while preserving order python list unique share improve this question..
Programmatically saving image to Django ImageField http://stackoverflow.com/questions/1308386/programmatically-saving-image-to-django-imagefield this behavior when running under Apache on Windows Server. While running under the 'runserver' on XP it does not execute this..
Threading in a PyQt application: Use Qt threads or Python threads? http://stackoverflow.com/questions/1595649/threading-in-a-pyqt-application-use-qt-threads-or-python-threads do you have a totally different suggestion Edit re bounty While the solution in my particular case will probably be using a..
Does python have 'private' variables in classes? http://stackoverflow.com/questions/1641219/does-python-have-private-variables-in-classes world and reading Bruce Eckels' Python 3 patterns idioms. While reading about classes...it goes on to say that in Python there..
Is `import module` better coding style than `from module import function`? http://stackoverflow.com/questions/1744258/is-import-module-better-coding-style-than-from-module-import-function how this hurts the code in any concrete way. PS. While writing this question I received a warning that the question..
Why is numpy's einsum faster than numpy's built in functions? http://stackoverflow.com/questions/18365073/why-is-numpys-einsum-faster-than-numpys-built-in-functions uint8 Note that the sum is correct In 3 x.sum Out 3 25500 While einsum will give the wrong result In 4 np.einsum 'i ' x Out..
What exactly do “u” and “r”string flags in Python, and what are raw string litterals? http://stackoverflow.com/questions/2081640/what-exactly-do-u-and-rstring-flags-in-python-and-what-are-raw-string-litte string flags in Python and what are raw string litterals While asking this question I realized I didn't know much about raw..
http://stackoverflow.com/questions/233673/lexical-closures-in-python closures in Python While I was investigating a problem I had with lexical closures in..
error: Unable to find vcvarsall.bat http://stackoverflow.com/questions/2817869/error-unable-to-find-vcvarsall-bat share improve this question For Windows installations While running setup.py for package installations Python 2.7 searches..
How can I sandbox Python in pure Python? http://stackoverflow.com/questions/3068139/how-can-i-sandbox-python-in-pure-python work for you since you're using GAE is the PyPy sandbox . While I haven't used it myself word on the intertubes is that it's..
http://stackoverflow.com/questions/3455456/what-kinds-of-patterns-could-i-enforce-on-the-code-to-make-it-easier-to-translat to build a working robust translator even with good tools. While it seems sexy and cool to build a translator instead of simply..
Weighted random selection with and without replacement http://stackoverflow.com/questions/352670/weighted-random-selection-with-and-without-replacement of elements from a list both with and without replacement. While there are well known and good algorithms for unweighted selection..
use of “global” keyword in python http://stackoverflow.com/questions/4693120/use-of-global-keyword-in-python class definition function definition or import statement. While formal parameters and class definition makes sens to me I'm.. 9 in module print me NameError name 'me' is not defined While if you use the global statement the variable will become available..
http://stackoverflow.com/questions/472000/python-slots the overhead of one dict for every object that uses slots. While this is sometimes a useful optimization it would be completely..
Using strides for an efficient moving average filter http://stackoverflow.com/questions/4936620/using-strides-for-an-efficient-moving-average-filter up whenever you inadvertently make a copy of your array. While the initial rolling array is just a view into the memory of..
Using only the DB part of Django http://stackoverflow.com/questions/579511/using-only-the-db-part-of-django I will clarify what I described in my original post. While it is gratifying that a major Django contributor has called..
Creating a singleton in python http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python is often more intuitive than multiple inheritance. Cons While objects created using MyClass would be true singleton objects.. two classes for each class we wish to make a singleton. While this is fine in my case I worry that this might not scale. Of.. the most common reason is they are implicit shared state . While with global variables and top level module imports are explicit..
Windows cmd encoding change causes Python crash http://stackoverflow.com/questions/878972/windows-cmd-encoding-change-causes-python-crash exception r while fixing up sys.stdout and sys.stderr e # While we're at it let's unmangle the command line arguments # This..
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