Answers for "pandas count rows by column value"

pandas count rows with value

len(df[df['score'] == 1.0])

Posted by: Guest on April-12-2020

pandas count values by column

df = pd.DataFrame({'a':list('abssbab')})
df.groupby('a').count()

Posted by: Guest on March-30-2020

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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