Answers for "count how many 1 in a column python"

1

number of times a value occurs in dataframne

df['a'].value_counts()
Posted by: Guest on October-16-2020
1

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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