Pandas: control new column names when merging two dataframes?

Question

I would like to merge two Pandas dataframes together and control the names of the new column values.

I originally created the dataframes from CSV files. The original CS

Answer 1

You can rename all the columns of ad by setting its columns as follows.

ad.columns = ['org', 'name', 'presents_spend', 'trees_spend']

Answer 2

The suffixes option in the merge function does this. The defaults are suffixes=('_x', '_y').

In general, renaming columns can be done with the rename method.

Answer 3

Another way is adding suffix to the columns of your dataframe before merging:

ad.columns = 'ad_' + ad.columns.values