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Add column with number of days between dates in DataFrame pandas
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df['A'] = pd.to_datetime(df['A'])
df['B'] = pd.to_datetime(df['B'])
In [11]: df.dtypes # if already datetime64 you don't need to use to_datetime
Out[11]:
A datetime64[ns]
B datetime64[ns]
dtype: object
In [12]: df['A'] - df['B']
Out[12]:
one -58 days
two -26 days
dtype: timedelta64[ns...
ReSharper - force curly braces around single line
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148
In the new version of ReSharper (2016.x) is has been moved to the Code Style.
UPD1: for ReSh...
Immediate function invocation syntax
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edited Jul 29 '14 at 19:24
answered Jun 2 '09 at 13:11
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std::back_inserter for a std::set?
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140
set doesn't have push_back because the position of an element is determined by the comparator ...
“An exception occurred while processing your request. Additionally, another exception occurred while
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+300
First, ...
add a string prefix to each value in a string column using Pandas
...gt;>> df = pd.DataFrame({'col':['a',0]})
>>> df
col
0 a
1 0
>>> df['col'] = 'str' + df['col'].astype(str)
>>> df
col
0 stra
1 str0
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How to see full symlink path
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edited Feb 14 '14 at 12:34
answered Apr 15 '13 at 14:32
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Can a dictionary be passed to django models on create?
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213
If title and body are fields in your model, then you can deliver the keyword arguments in your ...
How to use regex in String.contains() method in Java
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125
String.contains
String.contains works with String, period. It doesn't work with regex. It wil...
Are class names in CSS selectors case sensitive?
...s causing a mismatch in your second example. This has not changed in HTML5.1
This is because the case-sensitivity of selectors is dependent on what the document language says:
All Selectors syntax is case-insensitive within the ASCII range (i.e. [a-z] and [A-Z] are equivalent), except for parts...