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python Programming Glossary: thenRemove items from a list while iterating in Python http://stackoverflow.com/questions/1207406/remove-items-from-a-list-while-iterating-in-python the 'determine' to say what should be deleted. That would then be just. somelist x for x in somelist if not determine x EDIT..
How do I ensure that re.findall() stops at the right place? http://stackoverflow.com/questions/17765805/how-do-i-ensure-that-re-findall-stops-at-the-right-place ' title . title ' s .group 1 'aaa' If you wanted all tags then you should consider changing it to be non greedy ie . print..
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 rwh_primes1 rwh_primes2 sieveOfAtkin sieveOfEratosthenes sundaram3 sieve_wheel_30 ambi_sieve requires numpy primesfrom3to.. 57.4 sieve_wheel_30 63.0 rwh_primes2 67.8 sieveOfEratosthenes 147.0 ambi_sieve_plain 152.0 sundaram3 194.0 Of the plain.. 93.7 rwh_primes 94.6 sieve_wheel_30 97.4 sieveOfEratosthenes 178.0 ambi_sieve_plain 286.0 sieveOfAtkin 314.0 sundaram3..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained since generators can only be used once they calculate 0 then forget about it and calculate 1 and end calculating 4 one by.. in your function from the beginning until it hits yield then it'll return the first value of the loop. Then each other call.. candidate distance node._get_dist obj # If distance is ok then you can fill the result if distance max_dist and distance min_dist..
*args and **kwargs? [duplicate] http://stackoverflow.com/questions/3394835/args-and-kwargs arguments too. The explicit arguments get values first and then everything else is passed to args and kwargs . The named arguments..
http://stackoverflow.com/questions/3455456/what-kinds-of-patterns-could-i-enforce-on-the-code-to-make-it-easier-to-translat I can get with PHP is token_get_all which is a start. From then on I can build the AST symbol tables and control flow. Then.. amount of machinery you need to do this well is vast and then you need reliable parsers for languages with unreliable definitions.. applications you intend to convert are pretty small well then that 20 is OK. If you attempt to convert 100K SLOC then 20 is..
Ternary conditional operator in Python http://stackoverflow.com/questions/394809/ternary-conditional-operator-in-python The syntax is a if test else b First test is evaluated then either a or b is returned based on the Boolean value of test..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do the import statement and load those modules. It will then evaluate the def block creating a function object and creating.. myfunction that points to the function object. It will then read the if statement and see that __name__ does equal __main__..
Old style and new style classes in Python http://stackoverflow.com/questions/54867/old-style-and-new-style-classes-in-python concept of type if x is an instance of an old style class then x.__class__ designates the class of x but type x is always type.. defined type. If x is an instance of a new style class then type x is the same as x.__class__ . The major motivation for..
Static class variables in Python http://stackoverflow.com/questions/68645/static-class-variables-in-python recommends classmethod s over staticmethod as the method then receives the class type as the first argument but I'm still..
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference the_string return new_string # then you could call it like my_string return_a_whole_new_string my_string.. stuff_to_change 0 stuff_to_change 0 new_string # then you could call it like wrapper my_string use_a_wrapper_to_simulate_pass_by_reference..
What is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python __metaclass__ at the MODULE level and try to do the same. Then if it can't find any __metaclass__ at all it will use type to..
Convert Python dict to object? http://stackoverflow.com/questions/1305532/convert-python-dict-to-object def __init__ self entries self.__dict__.update entries Then you can use args 'a' 1 'b' 2 s Struct args s __main__.Struct..
http://stackoverflow.com/questions/15112125/if-x-or-y-or-z-blah that is the first true like value in the arguments. Then 2 1 would be False even though y 1 would be True . share improve..
Loop “Forgets” to Remove Some Items http://stackoverflow.com/questions/17299581/loop-forgets-to-remove-some-items advanced past it when you deleted the previous element. Then when you get to the o in Words you go to remove the first occurrence..
What is memoization and how can I use it in Python? http://stackoverflow.com/questions/1988804/what-is-memoization-and-how-can-i-use-it-in-python self.memo self.memo args self.f args return self.memo args Then def factorial k if k 2 return 1 return k factorial k 1 factorial..
How do I execute a program from python? os.system fails due to spaces in path http://stackoverflow.com/questions/204017/how-do-i-execute-a-program-from-python-os-system-fails-due-to-spaces-in-path import os os.system C Temp a b c Notepad.exe raw_input Then it fails with the following error 'C Temp a' is not recognized.. import os os.system ' C Temp a b c Notepad.exe ' raw_input Then it works. However if I add a parameter it stops working again..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained only returns the generator object this is a bit tricky Then your code will be run each time the for uses the generator... hits yield then it'll return the first value of the loop. Then each other call will run the loop you have written in the function.. with a one liner Map Zip without creating another list Then just import itertools . An example Let's see the possible orders..
Unexpected feature in a Python list of lists http://stackoverflow.com/questions/240178/unexpected-feature-in-a-python-list-of-lists 1 4 3 The list looked like this 1 1 1 1 1 1 1 1 1 1 1 1 Then I changed one of the innermost values myList 0 0 5 Now my list..
http://stackoverflow.com/questions/3455456/what-kinds-of-patterns-could-i-enforce-on-the-code-to-make-it-easier-to-translat on I can build the AST symbol tables and control flow. Then I believe I can start outputting code. I don't need a perfect..
How to add to the pythonpath in windows 7? http://stackoverflow.com/questions/3701646/how-to-add-to-the-pythonpath-in-windows-7 Advanced System Settings Environmental Variables . Then I added C My_Projects to my Path variable. It still doesn't.. Properties Advanced System Settings Environment Variables Then under system variables I create a new Variable called PythonPath..
Suggestions for a Cron like scheduler in Python? http://stackoverflow.com/questions/373335/suggestions-for-a-cron-like-scheduler-in-python self.args self.kwargs Note Not thoroughly tested Then your CronTab can be specified in normal python syntax as c CronTab..
Does python have an equivalent to Java Class.forName()? http://stackoverflow.com/questions/452969/does-python-have-an-equivalent-to-java-class-forname extract the module name from the fully qualified name. Then we import the module m __import__ module In this case m will..
http://stackoverflow.com/questions/7933596/django-dynamic-model-fields set of custom data fields but use the same database. Then the various concrete data fields can be defined as class UserCustomDataField..
Simple Digit Recognition OCR in OpenCV-Python http://stackoverflow.com/questions/9413216/simple-digit-recognition-ocr-in-opencv-python manually entered digit in another array here responses . e Then save both the arrays in seperate txt files. At the end of manual.. instance of classifier we are using here it is KNearest c Then we use KNearest.train function to train the data For testing.. and store its pixel values in an array as done earlier. d Then we use KNearest.find_nearest function to find the nearest item..
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