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Programmatically obtain the Android API level of a device?
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Vivek
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answered Nov 2 '14 at 11:01
Arkadiusz Cieślińsk...
How to insert element into arrays at specific position?
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23 Answers
23
Active
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Operation on every pair of element in a list
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233
Check out product() in the itertools module. It does exactly what you describe.
import iterto...
Numpy where function multiple conditions
...e values, then a and b returns b. So saying something like [0,1,2] and [2,3,4] will just give you [2,3,4]. Here it is in action:
In [230]: dists = np.arange(0,10,.5)
In [231]: r = 5
In [232]: dr = 1
In [233]: np.where(dists >= r)
Out[233]: (array([10, 11, 12, 13, 14, 15, 16, 17, 18, 19]),)
I...
How to get all subsets of a set? (powerset)
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137
The Python itertools page has exactly a powerset recipe for this:
from itertools import chain,...
pandas: filter rows of DataFrame with operator chaining
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398
I'm not entirely sure what you want, and your last line of code does not help either, but anyw...
How to print a percentage value in python?
...age floating point precision type:
>>> print "{0:.0%}".format(1./3)
33%
If you don't want integer division, you can import Python3's division from __future__:
>>> from __future__ import division
>>> 1 / 3
0.3333333333333333
# The above 33% example would could now be w...
How to pad zeroes to a string?
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Strings:
>>> n = '4'
>>> print(n.zfill(3))
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And for numbers:
>>> n = 4
>>> print(f'{n:03}') # Preferred method, python >= 3.6
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>>> print('%03d' % n)
004
>>> print(format(n, '03')) # python >= 2.6
004
>>> ...
List comprehension on a nested list?
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332
Here is how you would do this with a nested list comprehension:
[[float(y) for y in x] for x ...
Postgres NOT in array
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137
SELECT COUNT(*) FROM "messages" WHERE NOT (3 = ANY (recipient_ids))
You can always negate WHE...