how to use the apply function in pandas code example

Example: give function to pandas apply

import pandas as pd


def sum(x, y, z, m):
    return (x + y + z) * m


df = pd.DataFrame({'A': [1, 2], 'B': [10, 20]})

df1 = df.apply(sum, args=(1, 2), m=10)
print(df1)