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Regular expression that matches valid IPv6 addresses
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30 Answers
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Converting int to bytes in Python 3
I was trying to build this bytes object in Python 3:
13 Answers
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How can I delete one element from an array by value
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I think I've figured it out:
a = [3, 2, 4, 6, 3, 8]
a.delete(3)
#=> 3
a
#=> [2, 4, 6, 8]
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Does assignment with a comma work?
Why does aaa = 1,2,3 work and set the value of aaa to 1 ?
4 Answers
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Version of SQLite used in Android?
...database.sqlite package-level javadoc
Using the emulators:
adb shell sqlite3 --version
UPDATE: Since SDK 29 (emulator revision 8), the adb shell command gives:
/system/bin/sh: sqlite3: inaccessible or not found
Any ideas why? Issue tracker here.
SQLite 3.28.0 (window functions!):
30-11.0-R (Re...
How to generate all permutations of a list?
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33 Answers
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Using numpy to build an array of all combinations of two arrays
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131
In newer version of numpy (>1.8.x), numpy.meshgrid() provides a much faster implementation:
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What does axis in pandas mean?
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399
It specifies the axis along which the means are computed. By default axis=0. This is consisten...
How do I use floating-point division in bash?
...d
– Nahuel Fouilleul
Oct 4 '12 at 7:32
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Index all *except* one item in python
...you could use a list comp. For example, to make b a copy of a without the 3rd element:
a = range(10)[::-1] # [9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
b = [x for i,x in enumerate(a) if i!=3] # [9, 8, 7, 5, 4, 3, 2, 1, 0]
This is very general, and can be used with all iterables, incl...