pandas.DataFrame.sum

DataFrame.sum(axis=0, numeric_only=None, skipna=True, level=None)

Return sum over requested axis. NA/null values are excluded

axis : {0, 1}
0 for row-wise, 1 for column-wise
skipna : boolean, default True
Exclude NA/null values. If an entire row/column is NA, the result will be NA
level : int, default None
If the axis is a MultiIndex (hierarchical), count along a particular level, collapsing into a DataFrame
numeric_only : boolean, default None
Include only float, int, boolean data. If None, will attempt to use everything, then use only numeric data

sum : Series (or DataFrame if level specified)