pandas.DataFrame.count

DataFrame.count(axis=0, level=None, numeric_only=False)

Return Series with number of non-NA/null observations over requested axis. Works with non-floating point data as well (detects NaN and None)

axis : {0, 1}
0 for row-wise, 1 for column-wise
level : int, default None
If the axis is a MultiIndex (hierarchical), count along a particular level, collapsing into a DataFrame
numeric_only : boolean, default False
Include only float, int, boolean data

count : Series (or DataFrame if level specified)