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Preserving signatures of decorated functions
...ule __main__:
#
# funny_function(x, y, z=3)
# Computes x*y + 2*z
Python 3.4+
functools.wraps() from stdlib preserves signatures since Python 3.4:
import functools
def args_as_ints(func):
@functools.wraps(func)
def wrapper(*args, **kwargs):
args = [int(x) for x in args]
...
How do you append to a file in Python?
...
Python has many variations off of the main three modes, these three modes are:
'w' write text
'r' read text
'a' append text
So to append to a file it's as easy as:
f = open('filename.txt', 'a')
f.write('whatever yo...
Standard way to embed version into python package?
Is there a standard way to associate version string with a python package in such way that I could do the following?
17 Ans...
How do I get the number of elements in a list?
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The len() function can be used with several different types in Python - both built-in types and library types. For example:
>>> len([1,2,3])
3
Official 2.x documentation is here: len()
Official 3.x documentation is here: len()
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Get the first item from an iterable that matches a condition
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In Python 2.6 or newer:
If you want StopIteration to be raised if no matching element is found:
next(x for x in the_iterable if x > 3)
If you want default_value (e.g. None) to be returned instead:
next((x for x in the_it...
How to count the number of files in a directory using Python
I need to count the number of files in a directory using Python.
24 Answers
24
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How to print instances of a class using print()?
I am learning the ropes in Python. When I try to print an object of class Foobar using the print() function, I get an output like this:
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Is it possible for git-merge to ignore line-ending differences?
... and FileMerge in Mac seems to be great apps too.
– Léo Léopold Hertz 준영
May 25 '09 at 23:10
1
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setuptools: package data folder location
I use setuptools to distribute my python package. Now I need to distribute additional datafiles.
3 Answers
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Design Patterns: Factory vs Factory method vs Abstract Factory
... That's a fantastic explanation! Thanks!
– André Andrade
Jan 9 at 12:42
@AndréAndrade How to invoke the Facto...