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To find whether a column exists in data frame or not
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202
Assuming that the name of your data frame is dat and that your column name to check is "d", yo...
format statement in a string resource file
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271
You do not need to use formatted="false" in your XML. You just need to use fully qualified st...
Cleanest and most Pythonic way to get tomorrow's date?
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252
datetime.date.today() + datetime.timedelta(days=1) should do the trick
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Element-wise addition of 2 lists?
...t;>> from operator import add
>>> list( map(add, list1, list2) )
[5, 7, 9]
or zip with a list comprehension:
>>> [sum(x) for x in zip(list1, list2)]
[5, 7, 9]
Timing comparisons:
>>> list2 = [4, 5, 6]*10**5
>>> list1 = [1, 2, 3]*10**5
>>> %tim...
File content into unix variable with newlines
...anscript for a demo:
pax> cat num1.txt ; x=$(cat num1.txt)
line 1
line 2
pax> echo $x ; echo '===' ; echo "$x"
line 1 line 2
===
line 1
line 2
The reason why newlines are replaced with spaces is not entirely to do with the echo command, rather it's a combination of things.
When given a ...
How to pass arguments and redirect stdin from a file to program run in gdb?
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edited Dec 23 '10 at 17:32
answered Dec 23 '10 at 17:21
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How to set a single, main title above all the subplots with Pyplot?
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291
Use pyplot.suptitle or Figure.suptitle:
import matplotlib.pyplot as plt
import numpy as np
f...
Convert timedelta to total seconds
...s().
>>> import datetime
>>> datetime.timedelta(seconds=24*60*60).total_seconds()
86400.0
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Matplotlib: “Unknown projection '3d'” error
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edited Apr 4 '19 at 18:23
Matthew Salvatore Viglione
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Export Postgresql table data using pgAdmin
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edited Nov 25 '16 at 15:06
Alfonso Tienda
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