This is may DataFrame (two columns : name and age and two indices : player_id and season_id).

I want to change a value inside the MultiIndex in this way:

I've tried different ways without any effect.

• df.loc[[(991,28)]].index.set_levels = (991,26)

• df.loc[[(991,28)]].index.set_levels([991,26], inplace=True)

• df.loc[[(991,28)]].index = df.loc[[(991,28)]].index.set_levels([991,26])

Has someone some suggests?

CodePudding user response：

Use list comprehension with if-else and recreate df.index:

df.index = pd.MultiIndex.from_tuples([(991,26) if x == (991,28) else x for x in df.index], 
                                     names=df.index.names)
print (df)
                      name  age
player_id season_id            
991       26         Fabio   33
1028      28         Luigi   25

CodePudding user response：

this code should work either:

df.index.set_levels([26,28], level='season_id', inplace=True)