How to apply a mapping function to only a certain column in a grouped Pandas DataFrame in Python

Applying a mapping function to only a certain column in a pandas.DataFrame will perform a combining operation on a specific column.

Solution for How to apply a mapping function to only a certain column in a grouped Pandas DataFrame in Python : You can use DataFrame indexing to select a specific column Call DataFrame.groupby(by) with by as a column name or list of column names to group the rows of DataFrame by the values of the column by.

Use the indexing syntax obj.[column_name].mapper with obj as the previous result and mapper as a mapping function to apply mapper to the column with name column_name.


how-to-apply-a-mapping-function-to-only-a-certain-column-in-a-grouped-pandas-dataframe-in-python