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Relative imports in Python 3
...
myothermodule.py
...with a mymodule.py like this...
#!/usr/bin/env python3
# Exported function
def as_int(a):
return int(a)
# Test function for module
def _test():
assert as_int('1') == 1
if __name__ == '__main__':
_test()
...a myothermodule.py like this...
#!/usr/bin/env...
How to ignore deprecation warnings in Python
...
From documentation of the warnings module:
#!/usr/bin/env python -W ignore::DeprecationWarning
If you're on Windows: pass -W ignore::DeprecationWarning as an argument to Python. Better though to resolve the issue, by casting to int.
(Note that in Python 3.2, deprecation warnings ...
Python - Create a list with initial capacity
... if the preallocation method (size*[None]) itself is inefficient? Does the python VM actually allocate the list at once, or grow it gradually, just like the append() would?
– haridsv
Nov 15 '09 at 3:01
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Does Python support short-circuiting?
Does Python support short-circuiting in boolean expressions?
3 Answers
3
...
Format floats with standard json module
I am using the standard json module in python 2.6 to serialize a list of floats. However, I'm getting results like this:
...
How do I make python wait for a pressed key?
...
In Python 3 use input():
input("Press Enter to continue...")
In Python 2 use raw_input():
raw_input("Press Enter to continue...")
This only waits for the user to press enter though.
One might want to use msvcrt ((Win...
Python - 'ascii' codec can't decode byte
... you have invoked it on a string object (because you don't have the u). So python has to convert the string to a unicode object first. So it does the equivalent of
"你好".decode().encode('utf-8')
But the decode fails because the string isn't valid ascii. That's why you get a complaint about not...
How to get current CPU and RAM usage in Python?
...getting current system status (current CPU, RAM, free disk space, etc.) in Python? Bonus points for *nix and Windows platforms.
...
How do I create a constant in Python?
Is there a way to declare a constant in Python? In Java we can create constant values in this manner:
41 Answers
...
How to call a Parent Class's method from Child Class in Python?
When creating a simple object hierarchy in Python, I'd like to be able to invoke methods of the parent class from a derived class. In Perl and Java, there is a keyword for this ( super ). In Perl, I might do this:
...