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python Programming Glossary: insteadWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python with object though # but we can define __metaclass__ here instead to affect only this class # and this will work with object children.. the modified class Why would you use metaclasses classes instead of functions Since __metaclass__ can accept any callable why..
What is the difference between @staticmethod and @classmethod in Python? http://stackoverflow.com/questions/136097/what-is-the-difference-between-staticmethod-and-classmethod-in-python object instance is implicitly passed as the first argument instead of self . a.class_foo 1 # executing class_foo class '__main__.A'..
http://stackoverflow.com/questions/15112125/if-x-or-y-or-z-blah were not the case and the expression x or y or z 1 was instead interpreted as x or y or z 1 instead this would still not do.. x or y or z 1 was instead interpreted as x or y or z 1 instead this would still not do what you expect it to do. x or y or..
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 2.7 findall share improve this question Use re.search instead of re.findall if you only want one match s ' title aaa title..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained ... print i 0 1 4 It is just the same except you used instead of . BUT you can not perform for i in mygenerator a second time..
Import a module from a relative path http://stackoverflow.com/questions/279237/import-a-module-from-a-relative-path from another directory or executed with python execute instead of opening a new interpreter. import os sys inspect # realpath.. this approach does let you force Python to use your module instead of the ones installed on the system. Warning I don't really..
In a django form, How to make a field readonly (or disabled) so that it cannot be edited? http://stackoverflow.com/questions/324477/in-a-django-form-how-to-make-a-field-readonly-or-disabled-so-that-it-cannot-b could also set the attribute disabled on the input field instead of readonly . The clean_sku function will ensure that the readonly.. bound input data. If this is what you desire you should instead create a separate ModelForm that excludes the uneditable field..
http://stackoverflow.com/questions/3455456/what-kinds-of-patterns-could-i-enforce-on-the-code-to-make-it-easier-to-translat tools. While it seems sexy and cool to build a translator instead of simply doing a manual conversion for small code bases e.g...
How can I merge (union) two Python dictionaries in a single expression? http://stackoverflow.com/questions/38987/how-can-i-merge-union-two-python-dictionaries-in-a-single-expression method would be what I need if it returned its result instead of modifying a dict in place. x 'a' 1 'b' 2 y 'b' 10 'c' 11..
How to improve performance of this code? http://stackoverflow.com/questions/4295799/how-to-improve-performance-of-this-code so you will have to change your configurations into tuples instead of lists. If the order of closedlist is crucial to the algorithm..
http://stackoverflow.com/questions/509211/pythons-slice-notation number which means it counts from the end of the array instead of the beginning. So a 1 # last item in the array a 2 # last.. a 2 and a only contains one element you get an empty list instead of an error. Sometimes you would prefer the error so you have..
Python, Unicode, and the Windows console http://stackoverflow.com/questions/5419/python-unicode-and-the-windows-console Is there any way I can make Python automatically print a instead of failing in this situation Edit I'm using Python 2.5. python..
Understanding Python super() and init methods http://stackoverflow.com/questions/576169/understanding-python-super-and-init-methods changed in Python 3.0 you can just say super .__init__ instead of super ChildB self .__init__ which IMO is quite a bit nicer...
Common pitfalls in Python [duplicate] http://stackoverflow.com/questions/1011431/common-pitfalls-in-python therefore checking for type makes you lose flexibility. Instead use duck typing by checking behavior. E.G you expect a string..
Loop “Forgets” to Remove Some Items http://stackoverflow.com/questions/17299581/loop-forgets-to-remove-some-items over which is bound to result in some strange behavior. Instead make a copy of the list so you don't remove elements from what..
In Python, how do I determine if an object is iterable? http://stackoverflow.com/questions/1952464/in-python-how-do-i-determine-if-an-object-is-iterable Duck typing avoids tests using type or isinstance . Instead it typically employs the EAFP Easier to Ask Forgiveness than..
Simple Python Challenge: Fastest Bitwise XOR on Data Buffers http://stackoverflow.com/questions/2119761/simple-python-challenge-fastest-bitwise-xor-on-data-buffers use _mm_loadu_si128 instead of the faster _mm_load_si128 . Instead of using _mm_store_si128 we use _mm_stream_si128 which will..
python random string generation with upper case letters and digits http://stackoverflow.com/questions/2257441/python-random-string-generation-with-upper-case-letters-and-digits the elements on the fly one by one more about this here . Instead of asking to create 'n' times the string elem we will ask Python..
String comparison in Python: is vs. == [duplicate] http://stackoverflow.com/questions/2988017/string-comparison-in-python-is-vs boolean values you shouldn't be doing comparisons at all. Instead of if x True # do something write if x # do something For comparing..
In Django, how does one filter a QuerySet with dynamic field lookups? http://stackoverflow.com/questions/310732/in-django-how-does-one-filter-a-queryset-with-dynamic-field-lookups that filters based on dynamic arguments For example # Instead of Person.objects.filter name__startswith 'B' # ... and Person.objects.filter..
Remove specific characters from a string in python http://stackoverflow.com/questions/3939361/remove-specific-characters-from-a-string-in-python or even a translation table from string.maketrans . Instead you pass a dictionary as the only parameter. This dictionary..
How can I improve my paw detection? http://stackoverflow.com/questions/4087919/how-can-i-improve-my-paw-detection the data for each paw with data x for x in data_slices . Instead we'll draw a rectangle based on these slices which takes slightly..
http://stackoverflow.com/questions/4098131/matplotlib-update-a-plot is the slowest but most simplest and most robust option. Instead of replotting you can just update the data of the plot objects...
How to reliably guess the encoding between MacRoman, CP1252, Latin1, UTF-8, and ASCII http://stackoverflow.com/questions/4198804/how-to-reliably-guess-the-encoding-between-macroman-cp1252-latin1-utf-8-and what you ™ve got. However we aren ™t goint to go that far. Instead you will be expected to use a filename that ends in the encoding...
Python: Best way to check for Python version in a program that uses new language features? http://stackoverflow.com/questions/446052/python-best-way-to-check-for-python-version-in-a-program-that-uses-new-language the script would call ... except it doesn't get that far. Instead the script fails during python compilation before my routines..
http://stackoverflow.com/questions/472000/python-slots The proper use of __slots__ is to save space in objects. Instead of having a dynamic dict that allows adding attributes to objects..
Python decimal range() step value http://stackoverflow.com/questions/477486/python-decimal-range-step-value the following but it failed for i in range 0 1 0.1 print i Instead it says that the step argument cannot be zero which it's not...
How to write the Fibonacci Sequence in Python http://stackoverflow.com/questions/494594/how-to-write-the-fibonacci-sequence-in-python in Python I had originally coded the program wrongly. Instead of returning the Fibonacci numbers between a range ie. startNumber..
http://stackoverflow.com/questions/5276967/python-in-xcode-4-or-xcode-5 be able to develop in languages that require compiling . Instead of using the play button in the menu bar click Product Perform..
How to convert an integer to the shortest url-safe string in Python? http://stackoverflow.com/questions/561486/how-to-convert-an-integer-to-the-shortest-url-safe-string-in-python doesn't use actual Base64 so there's no padding characters Instead of converting the number first to a byte string base 256 it..
http://stackoverflow.com/questions/6169522/no-module-named-zlib use ubuntu so you'll want to double check the package . Instead of using python brew you might want to consider just compiling..
http://stackoverflow.com/questions/743164/do-while-loop-in-python print s try s i.next except StopIteration break print done Instead of 1 2 3 done I have the following output stdout 1 stdout 2..
Seeking clarification on apparent contradictions regarding weakly typed languages http://stackoverflow.com/questions/9929585/seeking-clarification-on-apparent-contradictions-regarding-weakly-typed-language might be cannot be determined without further context. Instead of using strongly typed and weakly typed you should describe..
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