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python Programming Glossary: usuallyWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python to change the class automatically when it's created. You usually do this for APIs where you want to create classes matching the.. will automatically get passed the same argument # that you usually pass to `type` def upper_attr future_class_name future_class_parents.. metaclasses is not because of metaclasses it's because you usually use metaclasses to do twisted stuff relying on introspection..
Common pitfalls in Python [duplicate] http://stackoverflow.com/questions/1011431/common-pitfalls-in-python again by mutable default arguments after many years. I usually don't use mutable default arguments unless needed but I think.. if you can just do it and handle the error Pythonistas usually say It's easier to ask for forgiveness than permission . Don't..
Having Django serve downloadable files http://stackoverflow.com/questions/1156246/having-django-serve-downloadable-files response 'X Sendfile' smart_str path_to_file # It's usually a good idea to set the 'Content Length' header too. # You can..
Local variables in Python nested functions http://stackoverflow.com/questions/12423614/local-variables-in-python-nested-functions variables I know that running into these kind of problems usually means one is 'doing it wrong' but I'd like to understand what..
How do I modify a text file in Python? http://stackoverflow.com/questions/125703/how-do-i-modify-a-text-file-in-python a Python thing. It is the same in all languages. What I usually do is read from the file make the modifications and write it..
Should you always favor xrange() over range()? http://stackoverflow.com/questions/135041/should-you-always-favor-xrange-over-range when you're iterating over a large range xrange is usually better. However there are still a few cases why you might prefer..
Difference between __str__ and __repr__ in Python http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python make sure you have enough information about c anyway. I usually use an eval like format MyClass this r that r self.this self.that..
Behaviour of increment and decrement operators in Python http://stackoverflow.com/questions/1485841/behaviour-of-increment-and-decrement-operators-in-python a language to allow programmers to optimize their code is usually frowned upon especially in a language like Python that is designed..
String comparison in Python: is vs. == [duplicate] http://stackoverflow.com/questions/2988017/string-comparison-in-python-is-vs x y is also True. Not always. NaN is a counterexample. But usually identity implies equality. The converse is not true Two distinct..
Can I run a Python script as a service (in Windows)? How? http://stackoverflow.com/questions/32404/can-i-run-a-python-script-as-a-service-in-windows-how AppServerSvc Your code would go in the main method usually with some kind of infinite loop that might be interrumped by..
What's the difference between list and tuples in Python? http://stackoverflow.com/questions/626759/whats-the-difference-between-list-and-tuples-in-python documentation also mentions this Tuples are immutable and usually contain an heterogeneous sequence ... . In a statically typed..
Python's use of __new__ and __init__? http://stackoverflow.com/questions/674304/pythons-use-of-new-and-init You should consider that what you are trying to do is usually done with a Factory and that's the best way to do it. Using..
Good Python modules for fuzzy string comparison? http://stackoverflow.com/questions/682367/good-python-modules-for-fuzzy-string-comparison string2 The similarity is a number between 0 and 1 it's usually equal or somewhat higher than difflib.SequenceMatcher.ratio..
How do I check if a file exists using Python? http://stackoverflow.com/questions/82831/how-do-i-check-if-a-file-exists-using-python improve this question Just to add to the answers it's usually safer to use the following approach try with open 'filename'..
Why is reading lines from stdin much slower in C++ than Python? http://stackoverflow.com/questions/9371238/why-is-reading-lines-from-stdin-much-slower-in-c-than-python which by the way are just short lines of three fields each usually about 20 chars wide though sometimes more . Code char input_a..
Accessing class variables from a list comprehension in the class definition http://stackoverflow.com/questions/13905741/accessing-class-variables-from-a-list-comprehension-in-the-class-definition created local namespace and the original global namespace. Usually the suite contains only function definitions. When the class..
Is there any simple way to benchmark python script? http://stackoverflow.com/questions/1593019/is-there-any-simple-way-to-benchmark-python-script there any simple way to benchmark python script Usually I use shell command time . My purpose is to test if data is..
Solving non-linear equations in python http://stackoverflow.com/questions/19542801/solving-non-linear-equations-in-python use G for Green's Functions and m for Model Parameters . Usually we'd use d for data instead of F as well. In python this would..
What's the best way to grab/parse command line arguments passed to a Python script? http://stackoverflow.com/questions/20063/whats-the-best-way-to-grab-parse-command-line-arguments-passed-to-a-python-scri be used when run with h help right there with the option. Usually you parse your arguments with options args parser.parse_args..
Google App Engine Internationalization Help needed (Python) http://stackoverflow.com/questions/2236153/google-app-engine-internationalization-help-needed-python real usage. Sometimes this method fails see this issue . Usually it's resolved by just reuploading an application but this is..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained that expects an iterable and adds its values to the list. Usually we pass a list to it a 1 2 b 3 4 a.extend b print a 1 2 3 4..
How to initialize a two-dimensional array in Python? http://stackoverflow.com/questions/2397141/how-to-initialize-a-two-dimensional-array-in-python in some_iterable which is shorter and sometimes clearer. Usually you get in the habit of recognizing these and often replacing..
http://stackoverflow.com/questions/261638/how-do-i-protect-python-code well known and the Python byte codes are well understood. Usually in cases like this you have to make a tradeoff. How important..
How is the 'is' keyword implemented in Python? http://stackoverflow.com/questions/2987958/how-is-the-is-keyword-implemented-in-python would make no sense. For example a 100 is a 100 is False . Usually Python writes each string into a different memory location interning..
Redirecting stdio from a command in os.system() in python http://stackoverflow.com/questions/3197509/redirecting-stdio-from-a-command-in-os-system-in-python stdio from a command in os.system in python Usually I can change stdout in python by changing the value of sys.stdout...
http://stackoverflow.com/questions/3775912/fourier-space-filtering frequency domain which implies that it has all 0 phase. Usually such a signal will be continuous only in a circular fashion..
Creating Dependency Graphs in Python http://stackoverflow.com/questions/4160746/creating-dependency-graphs-in-python management call flow share improve this question Usually dependency is defined for module package import. What you are..
Standard way to embed version into python package? http://stackoverflow.com/questions/458550/standard-way-to-embed-version-into-python-package in lots of 3rd party modules so it's the quasi standard. Usually __version__ is a string but sometimes it's also a float or tuple...
Limiting Memory Use in a *Large* Django QuerySet http://stackoverflow.com/questions/4856882/limiting-memory-use-in-a-large-django-queryset It essentially does this by making more database queries. Usually people are trying to do the exact opposite of that i.e. minimize..
Why not always use psyco for Python code? http://stackoverflow.com/questions/575385/why-not-always-use-psyco-for-python-code so far was that it made my code faster by only 15 . Usually it's better. Naturally using psyco is not a replacement for..
Python dictionary from an object's fields http://stackoverflow.com/questions/61517/python-dictionary-from-an-objects-fields from an arbitrary object it's sufficient to use __dict__ . Usually you'll declare your methods at class level and your attributes..
Python conditional assignment operator http://stackoverflow.com/questions/6402311/python-conditional-assignment-operator this construct is a sign of overly complicated code flow. Usually you'd do the following try v complicated except ComplicatedError..
http://stackoverflow.com/questions/6465549/import-paths-the-right-way this question What is the entry point for your program Usually the entry point for a program will be at the root of the project...
http://stackoverflow.com/questions/720867/http-authentication-in-python create a password manager and then tell urllib about it. Usually you won't care about the realm of the authentication just the..
a Regex for extracting sentence from a paragraph in python http://stackoverflow.com/questions/8465335/a-regex-for-extracting-sentence-from-a-paragraph-in-python from a paragraph using regular expressions in python. Usually the code that I'm testing extracts the sentence correctly but..
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