Python Pandas — I — Question 34

The rename() method in pandas DataFrame is used to alter the names of columns or rows. It accepts various parameters, including mapper and axis, which can be used together to rename columns and rows based on a mapping dictionary. The mapper parameter allows for a dict-like object mapping old names to new names, while axis specifies whether the renaming should occur along columns (axis=1) or rows (axis=0).

Yes, the mapper parameter and the columns parameter can be used together in the rename() method of a pandas DataFrame to rename columns. The mapper parameter is used to rename columns based on a mapping dictionary where keys represent the old column names and values represent the new column names. The columns parameter allows us to directly specify new column names without using a mapping dictionary. With columns, we provide a list-like input containing the new column names, and pandas will rename the columns accordingly.