Pandas: join DataFrames on field with different names?

Question

According to this documentation I can only make a join between fields having the same name.

Do you know if it\'s possible to join two DataFrames on a field having di

Answer 1

df2['id_key'] = df2['fk_key'].str.lower()

df1['id_key'] = df1['id_key'].str.lower()

Now try to merge the dataframes

df3 = pd.merge(df2,df1,how='inner', on='id_key')