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Pandas DataFrame Groupby two columns and get counts
...).reset_index().groupby('col2')[[0]].max()
Out[56]:
0
col2
A 3
B 2
C 1
D 3
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Java 8 NullPointerException in Collectors.toMap
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Can you do greater than comparison on a date in a Rails 3 search?
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How to read and write excel file
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In Python 2.6+ and Python 3, you might choose to use the newer string formatting method.
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