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How can I make pandas dataframe column headers all lowercase?
...e(3,0,-1), 'C':list('abc')})
>>> data
A B C
0 0 3 a
1 1 2 b
2 2 1 c
>>> data.columns = map(str.lower, data.columns)
>>> data
a b c
0 0 3 a
1 1 2 b
2 2 1 c
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Name of this month (Date.today.month as name)
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edited Jan 23 '15 at 23:15
answered Jan 30 '11 at 17:18
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How do I calculate the date six months from the current date using the datetime Python module?
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1086
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Get the cartesian product of a series of lists?
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itertools.product
Available from Python 2.6.
import itertools
somelists = [
[1, 2, 3],
['a', 'b'],
[4, 5]
]
for element in itertools.product(*somelists):
print(element)
Which is the same as,
for element in itertools.product([1, 2, 3], ['a', 'b'], ...
GraphViz - How to connect subgraphs?
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edited Mar 18 at 20:39
André C. Andersen
6,67733 gold badges3636 silver badges5959 bronze badges
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import module from string variable
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288
The __import__ function can be a bit hard to understand.
If you change
i = __import__('matp...
iterating over each character of a String in ruby 1.8.6 (each_char)
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edited Sep 28 '09 at 1:02
answered Sep 28 '09 at 0:55
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What is the >>>= operator in C?
...ply 0.
Meanwhile, 0X.1P1 is a hexadecimal floating point literal equal to 2/16 = 0.125. In any case, being non-zero, it's also true as a boolean, so negating it twice with !! again produces 1. Thus, the whole thing simplifies down to:
while( a[0] >>= a[1] )
The operator >>= is a co...
Set Colorbar Range in matplotlib
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182
Using vmin and vmax forces the range for the colors. Here's an example:
import matplotlib as...
One-line list comprehension: if-else variants
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342
x if y else z is the syntax for the expression you're returning for each element. Thus you need:...