Python / Pandas - Merge columns with the same index in a single cell -


i have dataframe:

                                     dude group_id                                                       820125                            armando 820125                       luis oswaldo 64907                            bernardo 64907                              sandro 64907                            veronica

i want this:

                                        dudes group_id                                                       820125                 armando | luis oswaldo 64907            bernardo | sandro | veronica

already tried variations of merge, join , concat wasn't successful. idea?

you can group index , join column:

df.groupby(level=0).agg(' | '.join) #                                   dude #group_id    #64907      bernardo | sandro | veronica #820125           armando | luis oswaldo

to join specific column only, use dictionary in agg function:

df.groupby(level=0).agg({"dude": ' | '.join})

same output above.


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