python Programming Glossary: questionWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python python oop metaclass python datamodel share improve this question Classes as objects Before understanding metaclasses you need.. it will use type to create the class object. Now the big question is what can you put in __metaclass__ The answer is something.. Why the hell would you use metaclasses Now the big question. Why would you use some obscure error prone feature Well usually..
Flatten (an irregular) list of lists in Python http://stackoverflow.com/questions/2158395/flatten-an-irregular-list-of-lists-in-python I saw that works for an arbitrary nesting is found in this question def flatten x result for el in x if hasattr el __iter__ and.. something Any problems python list share improve this question Using generator functions can make your example a little easier..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained . python iterator generator yield share improve this question To understand what yield does you must understand what generators.. Python is so cool. But this is another story for another question... You can stop here or read a little bit to see a advanced..
http://stackoverflow.com/questions/2709821/python-self-explained be appreciated. python class self share improve this question The reason you need to use self. is because Python does not..
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 obviously useful. Might've missed it though. Related question What is the most 𦑩ythonic way to iterate over a list in chunks.. a list in chunks python list chunks share improve this question Here's a generator that yields the chunks you want def chunks..
Flattening a shallow list in Python http://stackoverflow.com/questions/406121/flattening-a-shallow-list-in-python object. But the reduce method is fairly unreadable. So my question is Is there a simple way to flatten this list with a list comprehension.. Update Thanks to everyone who contributed to this question. Here is a summary of what I learned. I'm also making this a.. 2 3 5 89 6 python list comprehension share improve this question If you're just looking to iterate over a flattened version..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do example python idioms python import share improve this question Expanding a bit on Harley's answer... When the Python interpreter..
http://stackoverflow.com/questions/509211/pythons-slice-notation for a good guide. python slice share improve this question It's pretty simple really a start end # items start through..
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 chaining works. python decorator share improve this question Check out the documentation to see how decorators work. Here..
Calling an external command in Python http://stackoverflow.com/questions/89228/calling-an-external-command-in-python Python python shell command external share improve this question Look at the subprocess module in the stdlib from subprocess..
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 no attribute 'extend' python list share improve this question item for sublist in l for item in sublist is faster than the..
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference python reference pass by reference share improve this question Parameters are passed by value. The reason people are confused.. little. EDIT It's been noted that this doesn't answer the question that @David originally asked Is there something I can do to..
How to remove convexity defects in a Sudoku square? http://stackoverflow.com/questions/10196198/how-to-remove-convexity-defects-in-a-sudoku-square I am not getting the original boundary of the Sudoku. My Question How can I warp the image on the correct boundary of the Sudoku..
Inverse Distance Weighted (IDW) Interpolation with Python http://stackoverflow.com/questions/3104781/inverse-distance-weighted-idw-interpolation-with-python Distance Weighted IDW Interpolation with Python The Question What is the best way to calculate inverse distance weighted..
What's the proper way to install pip, virtualenv, and distribute for Python? http://stackoverflow.com/questions/4324558/whats-the-proper-way-to-install-pip-virtualenv-and-distribute-for-python to install pip virtualenv and distribute for Python Short Question What is the proper way to install pip virtualenv and distribute..
Differences between distribute, distutils, setuptools and distutils2? http://stackoverflow.com/questions/6344076/differences-between-distribute-distutils-setuptools-and-distutils2 but actually not all 地nd so on and so forth. The Question Could someone explain the differences What am I supposed to..
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell http://stackoverflow.com/questions/6964392/speed-comparison-with-project-euler-c-vs-python-vs-erlang-vs-haskell it doesn't need to load a runtime first Do the others . Question 1 Do Erlang Python and Haskell lose speed due to using arbitrary.. or don't they as long as the values are less than MAXINT Question 2 Why is Haskell so slow Is there a compiler flag that turns.. probable as Haskell is a book with seven seals to me. Question 3 Can you offer me some hints how to optimize these implementations..
pytest running scenarios in the correct order in the class http://stackoverflow.com/questions/12521924/pytest-running-scenarios-in-the-correct-order-in-the-class 2 Doesn't really look like a scenario for the Test class. QUESTION Is the any solution to run it in the correct order like test_1..
Green-threads and thread in python http://stackoverflow.com/questions/12758952/green-threads-and-thread-in-python Lock GIL a python process only runs one thread at a time. QUESTION But in the case of Green threads or so called greenlet or tasklets..
Using numpy.take for faster fancy indexing http://stackoverflow.com/questions/14491480/using-numpy-take-for-faster-fancy-indexing fancy indexing to keep the speed advantage ORIGINAL QUESTION I have a set of look up tables LUTs that I want to use on an..
HOW TO: Draggable legend in matplotlib http://stackoverflow.com/questions/2539477/how-to-draggable-legend-in-matplotlib TO Draggable legend in matplotlib QUESTION I'm drawing a legend on an axes object in matplotlib but the..
http://stackoverflow.com/questions/3064830/query-crashes-ms-access pull data from each table and merge them into a CSV file. QUESTION What do you recommend CLARIFICATIONS I am merging tables not..
How to plot data against specific dates on the x-axis using matplotlib http://stackoverflow.com/questions/3486121/how-to-plot-data-against-specific-dates-on-the-x-axis-using-matplotlib graph fig.add_subplot 111 graph.plot_date x y plt.show QUESTION SUMMARY My situation is more like I have an Axes instance ready..
python enumeration class for ORM purposes http://stackoverflow.com/questions/3588996/python-enumeration-class-for-orm-purposes enumeration class for ORM purposes EDITED QUESTION I'm trying to create a class factory that can generate enumeration..
Python: How to remove \n from a list element? http://stackoverflow.com/questions/3849509/python-how-to-remove-n-from-a-list-element data from the first line into list1 and so on.... NOW THE QUESTION The problem I currently have is that it's showing each list..
http://stackoverflow.com/questions/4226941/python-ioerror-errno-22-invalid-argument-when-using-cpickle-to-write-large that C is a local drive and Z is a network drive. ORIGINAL QUESTION Python 2.6.4 on Windows XP crashes if I use cPickle to write..
Compute a compounded return series in Python http://stackoverflow.com/questions/5515021/compute-a-compounded-return-series-in-python Xeon due to my analysis requirements. EDIT FOR STRIMP's QUESTION After you converted your code to use pandas data structures..
http://stackoverflow.com/questions/5520918/python-irc-bot-question bot test mynick define hi print hi mynick hi bot hi MY QUESTION IS HOW TO DO THIS python irc bots share improve this question..
numpy float: 10x slower than builtin in arithmetic operations? http://stackoverflow.com/questions/5956783/numpy-float-10x-slower-than-builtin-in-arithmetic-operations Python 3.1.3.5 Numpy 1.5.1 END OF EDIT ORIGINAL QUESTION I am getting really weird timings for the following code import..
How can I release memory after creating matplotlib figures http://stackoverflow.com/questions/7101404/how-can-i-release-memory-after-creating-matplotlib-figures Before too long python is taking up all of the RAM. QUESTION How can I release this memory UPDATE 2 A Second Solution I asked..
How to render my select field with WTForms? http://stackoverflow.com/questions/8463421/how-to-render-my-select-field-with-wtforms NOR EVEN RUN PYTHON CODE BUT A VERY QUICK HACK GIVEN THE QUESTION AND THE UNDERLYING CODE FROM WTFORMS. But it should give you..
Suppressing treatment of string as iterable http://stackoverflow.com/questions/9168904/suppressing-treatment-of-string-as-iterable by the use cases I found in both sre and difflib. ORIGINAL QUESTION While it's a neat feature of the language that a string is an..
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