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How to check if a column exists in Pandas
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Python string.join(list) on object array rather than string array
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answered Jan 31 '09 at 0:10
Adam RosenfieldAdam Rosenfield
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Changing case in Vim
...se, or use gu<motion> for lowercase.
For more of these, see Section 3 in Vim's change.txt help file.
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add a string prefix to each value in a string column using Pandas
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df['col'] = 'str' + df['col'].astype(str)
Example:
>>> df = pd.DataFrame({'col':['a...
How to get rid of the 'undeclared selector' warning
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edited Aug 21 '13 at 14:29
answered May 8 '12 at 23:50
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How do you see the entire command history in interactive Python?
...n even better answer.
– macetw
Sep 23 at 16:45
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Efficient way to remove keys with empty strings from a dict
...n 2.X
dict((k, v) for k, v in metadata.iteritems() if v)
Python 2.7 - 3.X
{k: v for k, v in metadata.items() if v is not None}
Note that all of your keys have values. It's just that some of those values are the empty string. There's no such thing as a key in a dict without a value; if it d...
Reading a huge .csv file
...from 100mb to 1.6gb). I can do this (very slowly) for the files with under 300,000 rows, but once I go above that I get memory errors. My code looks like this:
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How can I combine flexbox and vertical scroll in a full-height app?
...flexbox layout module ( display: box; and other things) in this link: CSS3 Flexbox full-height app and overflow
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Searching word in vim?
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edited Jan 19 '09 at 20:23
answered Jan 19 '09 at 19:51
Na...