python Programming Glossary: seeWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python 'echo_bar' True my_foo FooChild my_foo.echo_bar True You see where we are going in Python classes are objects and you can.. them this way MyClass MetaClass MyObject MyClass You've seen that type lets you do something like this MyClass type 'MyClass'.. type is just the class that creates class objects. You see that by checking the __class__ attribute. Everything and I mean..
Remove items from a list while iterating in Python http://stackoverflow.com/questions/1207406/remove-items-from-a-list-while-iterating-in-python reference to the original list unless you do it this way see Alex Martelli's answer for details . Also I liked Cides' suggestion..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained question... You can stop here or read a little bit to see a advanced use of generator Controlling a generator exhaustion.. another list Then just import itertools . An example Let's see the possible orders of arrival for a 4 horse race horses 1 2..
Best way to strip punctuation from a string in Python http://stackoverflow.com/questions/265960/best-way-to-strip-punctuation-from-a-string-in-python way to strip punctuation from a string in Python It seems like there should be a simpler way than import string s string... approaches such as regexes or string.translate as you can see from the below timings. For this type of problem doing it at..
http://stackoverflow.com/questions/2709821/python-self-explained to the specific object created from that class but I can't see why it explicitly needs to be added to every function as a parameter...
Python “is” operator behaves unexpectedly with integers http://stackoverflow.com/questions/306313/python-is-operator-behaves-unexpectedly-with-integers What is a better way of comparing two arbitrary objects to see whether they are the same and I don't know in advance whether..
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 flag that each threads checks on regular interval to see if it is time for him to exit. For example import threading..
*args and **kwargs? [duplicate] http://stackoverflow.com/questions/3394835/args-and-kwargs mylist a aardvark b baboon c cat As you can see in this case it takes the list or tuple of items and matches..
http://stackoverflow.com/questions/3455456/what-kinds-of-patterns-could-i-enforce-on-the-code-to-make-it-easier-to-translat machinery beyond the AST . For more on this topic see Life After Parsing . The remark about I don't need a perfect.. a working robust translator even with good tools. While it seems sexy and cool to build a translator instead of simply doing..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do function object. It will then read the if statement and see that __name__ does equal __main__ so it will execute the block..
How to install pip on windows? http://stackoverflow.com/questions/4750806/how-to-install-pip-on-windows environment which means it is not installed system wide see thegauraw's answer below http stackoverflow.com a 15915700 362951.. a 16377781 362951 If you are an ActivePython user see Rafe Kettler's answer below http stackoverflow.com a 4750846.. don't have a C C compiler installed and configured you'll see this cryptic error message. Error Unable to find vcvarsall.bat..
How can I make a chain of function decorators in Python? http://stackoverflow.com/questions/739654/how-can-i-make-a-chain-of-function-decorators-in-python improve this question Check out the documentation to see how decorators work. Here is what you asked for def makebold..
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference I pass a variable by reference The Python documentation seems unclear about whether parameters are passed by reference or.. have the changes reflected in the outer scope. Now let's see what happens when we try to change the reference that was passed.. to it had no effect that the code outside the method could see. The the_list was a copy of the outer_list reference and we..
What is different between all these OpenCV Python interfaces? http://stackoverflow.com/questions/10417108/what-is-different-between-all-these-opencv-python-interfaces is a modulo operation for uint8 arrays like images. See the article Difference between Matrix Arithmetic in OpenCV and..
Why doesn't this division work in python? http://stackoverflow.com/questions/1787249/why-doesnt-this-division-work-in-python truncated down when there would be a fractional part. See PEP 238 n 29 d 1009 print str float n d 0.0287413280476 In python..
Python: What OS am I running on? http://stackoverflow.com/questions/1854/python-what-os-am-i-running-on 'Linux' platform.release '2.6.22 15 generic' See platform Access to underlying platform 䏭 identifying data share..
http://stackoverflow.com/questions/1959744/python-list-problem on elements of a list you are reproducing the references. See the section List creation shortcuts on the Python Programming..
Changing default encoding of Python? http://stackoverflow.com/questions/2276200/changing-default-encoding-of-python encoding utf 8 console share improve this question See http blog.ianbicking.org illusive setdefaultencoding.html ...
What does plus equals (+=) do in Python? http://stackoverflow.com/questions/2347265/what-does-plus-equals-do-in-python is a shorthand for someListObject.extend iterableObject . See the documentation of extend . The extend function will append..
How do I filter ForeignKey choices in a Django ModelForm? http://stackoverflow.com/questions/291945/how-do-i-filter-foreignkey-choices-in-a-django-modelform which is a ChoiceField whose choices are a model QuerySet. See the reference for ModelChoiceField . So provide a QuerySet to..
http://stackoverflow.com/questions/316866/ping-a-site-in-python python network programming share improve this question See this pure Python ping by Matthew Dixon Cowles and Jens Diemer..
http://stackoverflow.com/questions/4015417/python-class-inherits-object objects for instance super @property and descriptors. See this article for a good description of what a new style class..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do to import your module and call your functions themselves. See this page for some extra details. share improve this answer..
Using global variables in a function other than the one that created them http://stackoverflow.com/questions/423379/using-global-variables-in-a-function-other-than-the-one-that-created-them playing with by explicitly requiring the global keyword. See other answers if you want to share a global variable across..
Running shell command from python and capturing the output http://stackoverflow.com/questions/4760215/running-shell-command-from-python-and-capturing-the-output that error messages are included in the returned output. See here for documentation. Also although Vartec's method will work..
Understanding Python super() and init methods http://stackoverflow.com/questions/576169/understanding-python-super-and-init-methods inheritance where all sorts of fun stuff can happen. See the standard docs on super if you haven't already. Edit Note..
Does “\d” in regex mean a digit? http://stackoverflow.com/questions/6479423/does-d-in-regex-mean-a-digit
Security of Python's eval() on untrusted strings? http://stackoverflow.com/questions/661084/security-of-pythons-eval-on-untrusted-strings cannot secure eval with a blacklist approach like this. See Eval really is dangerous for examples of input that will segfault..
Creating a singleton in python http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python of a class means and how to implement that definition. See for example http code.activestate.com recipes 498149 which essentially..
Static class variables in Python http://stackoverflow.com/questions/68645/static-class-variables-in-python member can't be accessed using a reference to an instance. See what the Python tutorial has to say on the subject of classes..
How do I convert local time to UTC in Python? http://stackoverflow.com/questions/79797/how-do-i-convert-local-time-to-utc-in-python datetime.datetime with no attached timezone information. See documentation for datetime.strptime for information on parsing..
Upload files in Google App Engine http://stackoverflow.com/questions/81451/upload-files-in-google-app-engine this question is answered in the App Egnine documentation. See an example on Uploading User Images . HTML code inside form..
Converting datetime.date to UTC timestamp in Python http://stackoverflow.com/questions/8777753/converting-datetime-date-to-utc-timestamp-in-python between What time is it and How many seconds have elapsed See also datetime needs an epoch method Python 2 To adapt the above..
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