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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...
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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Explicitly select items from a list or tuple
I have the following Python list (can also be a tuple):
8 Answers
8
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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.
Python + Django page redirect
...thod as of Django 1.0. See this answer: stackoverflow.com/questions/523356/python-django-page-redirect/…
– Jake
Dec 16 '10 at 0:40
2
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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...
Why is reading lines from stdin much slower in C++ than Python?
I wanted to compare reading lines of string input from stdin using Python and C++ and was shocked to see my C++ code run an order of magnitude slower than the equivalent Python code. Since my C++ is rusty and I'm not yet an expert Pythonista, please tell me if I'm doing something wrong or if I'm mis...
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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Remove all whitespace in a string
...he str.join() documentation, when you call sentence.join(str_list) you ask python to join items from str_list with sentenceas separator.
– Cédric Julien
Nov 24 '16 at 16:24
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NumPy: function for simultaneous max() and min()
... can optimize this.
Here's some fortran code which can be compiled into a python module via f2py (maybe a Cython guru can come along and compare this with an optimized C version ...):
subroutine minmax1(a,n,amin,amax)
implicit none
!f2py intent(hidden) :: n
!f2py intent(out) :: amin,amax
!...