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How to take column-slices of dataframe in pandas
...ing to 'bar'
df.loc[:, :'bar']
# foo bar
# slice from 'quz' to the end by 3
df.loc[:, 'quz'::3]
# quz sat
# attempt from 'sat' to 'bar'
df.loc[:, 'sat':'bar']
# no columns returned
# slice from 'sat' to 'bar'
df.loc[:, 'sat':'bar':-1]
sat cat ant quz bar
# slice notation is syntatic sugar for th...
CodeIgniter activerecord, retrieve last insert id?
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answered Dec 31 '09 at 16:16
Dennis DecoeneDennis Decoene
6,57844 gold badges2424 silver badges4141 bronze badges
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How to show current year in view?
...18
Athix
3311 silver badge99 bronze badges
answered May 30 '11 at 10:39
Emil AhlbäckEmil Ahlbäck
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SVG fill color transparency / alpha?
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Abhi Beckert
30.5k1111 gold badges7777 silver badges105105 bronze badges
answered May 18 '11 at 9:32
Williham Totl...
src/lxml/etree_defs.h:9:31: fatal error: libxml/xmlversion.h: No such file or directory
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edited Aug 6 '13 at 6:10
answered Apr 2 '13 at 9:48
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Python Infinity - Any caveats?
...*2
4.0
>>> _**2
16.0
>>> _**2
256.0
>>> _**2
65536.0
>>> _**2
4294967296.0
>>> _**2
1.8446744073709552e+19
>>> _**2
3.4028236692093846e+38
>>> _**2
1.157920892373162e+77
>>> _**2
1.3407807929942597e+154
>>> _**2
Traceba...
What's the difference between and in servlet
I am migrating from Spring 2.5 to Spring 3.
3 Answers
3
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How can I open multiple files using “with open” in Python?
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As of Python 2.7 (or 3.1 respectively) you can write
with open('a', 'w') as a, open('b', 'w') as b:
do_something()
In earlier versions of Python, you can sometimes use
contextlib.nested() to nest context managers. This won't work as expe...
What is the difference between assert, expect and should in Chai?
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edited May 23 '17 at 12:10
Community♦
111 silver badge
answered Jan 28 '14 at 12:01
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Writing Unicode text to a text file?
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323
Deal exclusively with unicode objects as much as possible by decoding things to unicode object...
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