How to calculate cumulative sum in Pandas

Here’s how to calculate cumulative sum in Pandas.

How to calculate cumulative sum in Pandas

To calculate a cumulative sum in Pandas just use a cumsum method which Pandas is offering to you.

import pandas as pd

my_df = pd.DataFrame({"my_column1": [9, 2, 3, 5],
                     "my_column2": [3, 7, 6, 4],
                      "my_column3": [4, 8, 8, 8]})

print(f'The cumulative sum of columns:\n{my_df.cumsum()}')

The cumulative sum of columns:
   my_column1  my_column2  my_column3
0           9           3           4
1          11          10          12
2          14          16          20
3          19          20          28

For more details see the documentation of cumsum function.