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How to find the installed pandas version
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375
Check pandas.__version__:
In [76]: import pandas as pd
In [77]: pd.__version__
Out[77]: '0.1...
Is it possible to use 'else' in a list comprehension? [duplicate]
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337
The syntax a if b else c is a ternary operator in Python that evaluates to a if the condition ...
dropping infinite values from dataframes in pandas?
...2]: df.replace([np.inf, -np.inf], np.nan)
Out[12]:
0
0 1
1 2
2 NaN
3 NaN
The same method would work for a Series.
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Converting JavaScript object with numeric keys into array
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328
It's actually very straight forward with jQuery's $.map
var arr = $.map(obj, function(el) { r...
how to convert array values from string to int?
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edited Apr 23 '19 at 10:46
Rahul
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a...
What does the “at” (@) symbol do in Python?
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331
An @ symbol at the beginning of a line is used for class, function and method decorators.
Rea...
How would you implement an LRU cache in Java?
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edited Aug 10 '10 at 16:36
answered Dec 23 '09 at 15:43
H...
What is the Ruby (spaceship) operator?
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369
Perl was likely the first language to use it. Groovy is another language that supports it. Bas...
Finding the index of elements based on a condition using python list comprehension
... of a list.
>>> import numpy
>>> a = numpy.array([1, 2, 3, 1, 2, 3])
>>> a
array([1, 2, 3, 1, 2, 3])
>>> numpy.where(a > 2)
(array([2, 5]),)
>>> a > 2
array([False, False, True, False, False, True], dtype=bool)
>>> a[numpy.where(a > 2...
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...