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python Programming Glossary: thereWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python this is why it's a class . But still it's an object and therefore you can assign it to a variable you can copy it you can.. to hold the class reference. They can be different but there is no reason to complicate things. type accepts a dictionary.. you do class Foo Bar pass Python does the following Is there a __metaclass__ attribute in Foo If yes create in memory a class..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained the function one more time and return the next value until there is no value to return. The generator is considered empty once.. will be called each time you use the generator object # If there is still a child of the node object on its left # AND if distance.. distance max_dist self._median yield self._leftchild # If there is still a child of the node object on its right # AND if distance..
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 there any way to kill a Thread in Python Is it possible to terminate.. self self._thread_id tid return tid # TODO in python 2.6 there's a simpler way to do self.ident raise AssertionError could..
Flattening a shallow list in Python http://stackoverflow.com/questions/406121/flattening-a-shallow-list-in-python But I get in trouble of the NameError variety there because the name 'menuitem' is not defined . After googling.. for mi in list_of_menuitems Note I need that list x call there because x is a Django QuerySet object. But the reduce method.. reduce method is fairly unreadable. So my question is Is there a simple way to flatten this list with a list comprehension..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do does equal __main__ so it will execute the block shown there. One of the reasons for doing this is that sometimes you write..
http://stackoverflow.com/questions/509211/pythons-slice-notation the last two items Python is kind to the programmer if there are fewer items than you ask for. For example if you ask for..
Making a flat list out of list of lists in Python [duplicate] http://stackoverflow.com/questions/952914/making-a-flat-list-out-of-list-of-lists-in-python for flattening a sequence of sequences I wonder whether there is a shortcut to make a simple list out of list of lists in.. of lists in Python. I can do that in a for loop but maybe there is some cool one liner I tried it with reduce but I get an error... the implied use in sum are of necessity O L 2 when there are L sublists as the intermediate result list keeps getting..
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference print self.variable def Change self var var 'Changed' Is there something I can do to pass the variable by actual reference.. reference and we had the_list point to a new list but there was no way to change where outer_list pointed. String an immutable.. pointed. String an immutable type It's immutable so there's nothing we can do to change the contents of the string Now..
What is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python module should have their attributes written in uppercase. There are several ways to do this but one way is to set __metaclass__.. may have noticed the extra argument upperattr_metaclass . There is nothing special about it a method always receives the current.. cls .__new__ cls clsname bases uppercase_attr That's it. There is really nothing more about metaclasses. The reason behind..
Which Python memory profiler is recommended? [closed] http://stackoverflow.com/questions/110259/which-python-memory-profiler-is-recommended about that but somehow the docs on that are a bit sparse. There is a graphical browser as well written in Tk. share improve..
Print in terminal with colors using Python? http://stackoverflow.com/questions/287871/print-in-terminal-with-colors-using-python including macOS and window provided you enable ansi.sys . There are ansi codes for setting the color moving the cursor and more...
Short Description of Python Scoping Rules http://stackoverflow.com/questions/291978/short-description-of-python-scoping-rules else. And maybe lambda functions pass a bit differently There must be a simple reference or algorithm somewhere. It's a confusing..
How do you split a list into evenly sized chunks in Python? http://stackoverflow.com/questions/312443/how-do-you-split-a-list-into-evenly-sized-chunks-in-python to split it up into equal size chunks and operate on it. There are some obvious ways to do this like keeping a counter and..
Is there a simple, elegant way to define Singletons in Python? [closed] http://stackoverflow.com/questions/31875/is-there-a-simple-elegant-way-to-define-singletons-in-python simple elegant way to define Singletons in Python closed There seem to be many ways to define Singletons in Python. Is there..
How to install pip on windows? http://stackoverflow.com/questions/4750806/how-to-install-pip-on-windows to python 3. The accepted answer uses the oficial method. There are also other ways You can use it inside a virtual environment.. answer below http stackoverflow.com a 15915700 362951 There is a simple exe installer which just works http stackoverflow.com.. command line. Try installing a package pip install httpie There you go hopefully Proxy problems If you work in an office you..
Does Python have a built in function for string natural sort? http://stackoverflow.com/questions/4836710/does-python-have-a-built-in-function-for-string-natural-sort python sorting python 3.x share improve this question There is a third party library for this on PyPI called natsort . For..
http://stackoverflow.com/questions/509211/pythons-slice-notation the beginning through end 1 a # a copy of the whole array There is also the step value which can be used with any of the above..
How can you profile a Python script? http://stackoverflow.com/questions/582336/how-can-you-profile-a-python-script 0.000 0.000 0.000 range 1 0.003 0.003 0.003 0.003 sum EDIT There is a great talk on profiling from PyCon here http blip.tv file..
What's the difference between list and tuples in Python? http://stackoverflow.com/questions/626759/whats-the-difference-between-list-and-tuples-in-python just the line number without replacing the whole tuple . There are some interesting articles on this issue e.g. Python Tuples..
http://stackoverflow.com/questions/886221/does-django-scale What are the largest sites built on Django today There isn't any single place that collects information about traffic.. will happen by throwing together a bunch of Django models There are of course many more sites and bloggers of interest but I..
http://stackoverflow.com/questions/931092/reverse-a-string-in-python a string in Python There is no built in reverse function in Python's str object. What..
Simple Digit Recognition OCR in OpenCV-Python http://stackoverflow.com/questions/9413216/simple-digit-recognition-ocr-in-opencv-python images of each digit. I would like to train with them. There is a sample letter_recog.py that comes with OpenCV sample. But..
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