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Rolling or sliding window iterator?
...(aka sliding window) iterable over a sequence/iterator/generator. Default Python iteration can be considered a special case, where the window length is 1. I'm currently using the following code. Does anyone have a more Pythonic, less verbose, or more efficient method for doing this?
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How do I get PyLint to recognize numpy members?
I am running PyLint on a Python project. PyLint makes many complaints about being unable to find numpy members. How can I avoid this while avoiding skipping membership checks.
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Python - Passing a function into another function
I am solving a puzzle using python and depending on which puzzle I am solving I will have to use a special set of rules. How can I pass a function into another function in Python?
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Python string.replace regular expression [duplicate]
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Not the answer you're looking for? Browse other questions tagged python regex replace or ask your own question.
Explicitly select items from a list or tuple
I have the following Python list (can also be a tuple):
8 Answers
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Rotating a two-dimensional array in Python
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That's a clever bit.
First, as noted in a comment, in Python 3 zip() returns an iterator, so you need to enclose the whole thing in list() to get an actual list back out, so as of 2020 it's actually:
list(zip(*original[::-1]))
Here's the breakdown:
[::-1] - makes a shallow co...
How to merge dictionaries of dictionaries?
...tate the first argument; that makes the "reduce" easier to explain]
ps in python 3, you will also need from functools import reduce
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Understanding repr( ) function in Python
...can "eval()"
it, meaning it is a string representation that evaluates to a Python
object)
5 Answers
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How to leave/exit/deactivate a Python virtualenv
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To activate a Python virtual environment:
$cd ~/python-venv/
$./bin/activate
To deactivate:
$deactivate
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Get last n lines of a file, similar to tail
... If you use lower-level I/O, then you might see a speedup.
UPDATE
for Python 3.2 and up, follow the process on bytes as In text files (those opened without a "b" in the mode string), only seeks relative to the beginning of the file are allowed (the exception being seeking to the very file end w...