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What is :: (double colon) in Python when subscripting sequences?
I know that I can use something like string[3:4] to get a substring in Python, but what does the 3 mean in somesequence[::3] ?
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When should you use constexpr capability in C++11?
...red Mar 2 '15 at 23:51
Filip Roséen - refpFilip Roséen - refp
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Check whether a path is valid in Python without creating a file at the path's target
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Call the is_path_exists_or_creatable() function defined below.
Strictly Python 3. That's just how we roll.
A Tale of Two Questions
The question of "How do I test pathname validity and, for valid pathnames, the existence or writability of those paths?" is clearly two separate questions. Both are...
“Pretty” Continuous Integration for Python
...ted with Trac. Apache Gump is the CI tool used by Apache. It is written in Python.
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How can I create a copy of an object in Python?
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How can I create a copy of an object in Python?
So, if I change values of the fields of the new object, the old object should not be affected by that.
You mean a mutable object then.
In Python 3, lists get a copy method (in 2, you'd use a slice to make a copy):
&g...
Focus-follows-mouse (plus auto-raise) on Mac OS X
...ght click, while ⌘-click extends the selection.
– Sébastien
Nov 2 '16 at 15:45
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What is the standard Python docstring format? [closed]
I have seen a few different styles of writing docstrings in Python, is there an official or "agreed-upon" style?
7 Answers
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Standard deviation of a list
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Since Python 3.4 / PEP450 there is a statistics module in the standard library, which has a method stdev for calculating the standard deviation of iterables like yours:
>>> A_rank = [0.8, 0.4, 1.2, 3.7, 2.6, 5.8]
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How to implement a good __hash__ function in python [duplicate]
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It's unfortunate that Python does not make a combine_hashes function available.
– Fred Foo
Sep 20 '12 at 11:34
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multiprocessing: sharing a large read-only object between processes?
...ed via multiprocessing share objects created earlier in the program?"
No (python before 3.8), and Yes in 3.8 (https://docs.python.org/3/library/multiprocessing.shared_memory.html#module-multiprocessing.shared_memory)
Processes have independent memory space.
Solution 1
To make best use of a large...