group by count dataframe

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showing results for - "group by count dataframe"
Veronica
01 Aug 2017
1df.groupby(['col1', 'col2']).size().reset_index(name='counts')
Lisa
28 Jan 2017
1df.groupby(['col1','col2']).size()
Jazmín
23 Apr 2016
1df[['col1', 'col2', 'col3', 'col4']].groupby(['col1', 'col2']).agg(['mean', 'count'])
2
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