Answers for "how to python dataframe groupby and count"

group by count dataframe

df.groupby(['col1', 'col2']).size().reset_index(name='counts')

Posted by: Guest on February-24-2020

pandas count

>>> df.set_index(["Person", "Single"]).count(level="Person")
        Age
Person
John      2
Lewis     1
Myla      1

Posted by: Guest on February-24-2020

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