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Can someone explain __all__ in Python?
I have been using Python more and more, and I keep seeing the variable __all__ set in different __init__.py files. Can someone explain what this does?
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Python extract pattern matches
Python 2.7.1
I am trying to use python regular expression to extract words inside of a pattern
9 Answers
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Override Python's 'in' operator?
If I am creating my own class in Python, what function should I define so as to allow the use of the 'in' operator, e.g.
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Correct way to write line to file?
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You should use the print() function which is available since Python 2.6+
from __future__ import print_function # Only needed for Python 2
print("hi there", file=f)
For Python 3 you don't need the import, since the print() function is the default.
The alternative would be to use:
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How to import the class within the same directory or sub directory?
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Python 2
Make an empty file called __init__.py in the same directory as the files. That will signify to Python that it's "ok to import from this directory".
Then just do...
from user import User
from dir import Dir
The s...
HTTP requests and JSON parsing in Python
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The requests Python module takes care of both retrieving JSON data and decoding it, due to its builtin JSON decoder. Here is an example taken from the module's documentation:
>>> import requests
>>> r = requests.get('ht...
Single quotes vs. double quotes in Python [closed]
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Most python coders code it that way. There is no explicit rule, but because we often read the code that way, it becomes an habit.
– e-satis
Mar 8 '10 at 14:35
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Converting integer to binary in python
...rts the number to its binary representation
If you're using a version of Python 3.6 or above, you can also use f-strings:
>>> f'{6:08b}'
'00000110'
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Which is more preferable to use: lambda functions or nested functions ('def')?
...ction that takes a function object, the only way to do that in one line of python code is with a lambda. There's no equivalent with def.
In some frameworks this is actually quite common; for example, I use Twisted a lot, and so doing something like
d.addCallback(lambda result: setattr(self, _some...
Wrap long lines in Python [duplicate]
How do I wrap long lines in Python without sacrificing indentation?
6 Answers
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