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pandas read_csv and filter columns with usecols
...mport StringIO
csv = r"""dummy,date,loc,x
bar,20090101,a,1
bar,20090102,a,3
bar,20090103,a,5
bar,20090101,b,1
bar,20090102,b,3
bar,20090103,b,5"""
df = pd.read_csv(StringIO(csv),
header=0,
index_col=["date", "loc"],
usecols=["date", "loc", "x"],
parse_dates=["date"...
Converting NumPy array into Python List structure?
How do I convert a NumPy array to a Python List (for example [[1,2,3],[4,5,6]] ), and do it reasonably fast?
5 Answers
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Ruby 2.0.0p0 IRB warning: “DL is deprecated, please use Fiddle”
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The message you received is common when you have ruby 2.0.0p0 (2013-02-24) on top of Windows.
The message "DL is deprecated, please use Fiddle" is not an error; it's only a warning.
The source is the Deprecation notice for DL introduced some time ago in dl.rb ( see revisions/37910 ).
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Are Javascript arrays sparse?
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edited May 23 '17 at 11:54
Community♦
111 silver badge
answered Oct 2 '09 at 17:21
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How to set a single, main title above all the subplots with Pyplot?
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3 Answers
3
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How to convert list of tuples to multiple lists?
... function zip() will almost do what you want:
>>> zip(*[(1, 2), (3, 4), (5, 6)])
[(1, 3, 5), (2, 4, 6)]
The only difference is that you get tuples instead of lists. You can convert them to lists using
map(list, zip(*[(1, 2), (3, 4), (5, 6)]))
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Why does SIGPIPE exist?
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edited Oct 26 '16 at 9:13
Ton van den Heuvel
8,39155 gold badges3434 silver badges7575 bronze badges
a...
How to truncate the time on a DateTime object in Python?
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390
I think this is what you're looking for...
>>> import datetime
>>> dt = dat...
Emulate ggplot2 default color palette
...lt color palette for a desired number of colors. For example, an input of 3 would produce a character vector of HEX colors with these colors:
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