Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandas is one of those packages and makes importing and analyzing data much easier.

Pandas dataframe.sub() function is used for finding the subtraction of dataframe and other, element-wise. This function is essentially same as doing dataframe – other but with support to substitute for missing data in one of the inputs.

Pandas dataframe.sub() : https://www.geeksforgeeks.org/python-pandas-dataframe-sub/