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Retain cycle on `self` with blocks
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answered Dec 4 '10 at 8:14
Lily BallardLily Ballard
164k2525 gold badges355355 silver badges331331 bronze badges
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Grep characters before and after match?
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3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}'
23_string_and
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improv...
Naming returned columns in Pandas aggregate function? [duplicate]
...om.load_data('Loblolly')
print(data.head())
# height age Seed
# 1 4.51 3 301
# 15 10.89 5 301
# 29 28.72 10 301
# 43 41.74 15 301
# 57 52.70 20 301
df = data.groupby('Seed').agg(
{'age':['sum'],
'height':['mean', 'std']})
print(df.head())
# age h...
How to get indices of a sorted array in Python
...t;>> import numpy
>>> numpy.argsort(myList)
array([0, 1, 2, 4, 3])
http://docs.scipy.org/doc/numpy/reference/generated/numpy.argsort.html
This returns the arguments that would sort the array or list.
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Remove first element from $@ in bash [duplicate]
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4 Answers
4
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Can CSS detect the number of children an element has?
...i {
width: 33.3333%;
}
/* four items */
li:first-child:nth-last-child(4),
li:first-child:nth-last-child(4) ~ li {
width: 25%;
}
The trick is to select the first child when it's also the nth-from-the-last child. This effectively selects based on the number of siblings.
Credit for this tec...
Is putting a div inside an anchor ever correct?
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14 Answers
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Comparing two dictionaries and checking how many (key, value) pairs are equal
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edited Jun 14 '18 at 13:15
Olivier Melançon
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What is difference between Errors and Exceptions? [duplicate]
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4 Answers
4
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Why 0 is true but false is 1 in the shell?
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94
It's a convention, but a particularly useful one when you think about it. In general, if a prog...