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How to initialize a dict with keys from a list and empty value in Python?
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dict.fromkeys([1, 2, 3, 4])
This is actually a classmethod, so it works for dict-subclasses (like collections.defaultdict) as well. The optional second argument specifies the value to use for the keys (defaults to None.)
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Get last result in interactive Python shell
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Underscore.
>>> 5+5
10
>>> _
10
>>> _ + 5
15
>>> _
15
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Pinging servers in Python
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117
This function works in any OS (Unix, Linux, macOS, and Windows)
Python 2 and Python 3
EDITS:
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How can I pass a member function where a free function is expected?
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146
There isn't anything wrong with using function pointers. However, pointers to non-static membe...
What is the fastest way to get the value of π?
... are a lot of formulae.
Here is a method that converges quickly — about 14 digits per iteration. PiFast, the current fastest application, uses this formula with the FFT. I'll just write the formula, since the code is straightforward. This formula was almost found by Ramanujan and discovered by Ch...
What are type lambdas in Scala and what are their benefits?
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148
Type lambdas are vital quite a bit of the time when you are working with higher-kinded types.
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What do hjust and vjust do when making a plot using ggplot?
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The value of hjust and vjust are only defined between 0 and 1:
0 means left-justified
1 means right-justified
Source: ggplot2, Hadley Wickham, page 196
(Yes, I know that in most cases you can use it beyond this range, but don't expect it to behave in any specific way. This is ou...
Find integer index of rows with NaN in pandas dataframe
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11 Answers
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How to add a line break in an Android TextView?
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edited Aug 27 '17 at 9:44
Yuliia Ashomok
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