group data

Question 1

Return a GroupBy object, grouped by values in column named “col”.

Answer 1

df.groupby(by=”col”)

Question 2

Return a GroupBy object, grouped by values in index level named “ind”.

Answer 2

df.groupby(level=”ind”)

Question 3

Return the number of rows if Series. Otherwise return the number of rows times number of columns if DataFrame.

Answer 3

Question 4

Aggregate using one or more operations over the specified axis.

Answer 4