Это скорее проблема кодирования n-hot -
>>> def change_df(x):
... for i in x['Concepts_clean'].replace('[','').replace(']','').split(','):
... x[i.strip()] = 1
... return x
...
>>> df.apply(change_df, axis=1)
Пример вывода
Concepts_clean Ecoute Informations Tarifs
[Tarifs] 0.0 0.0 1.0
[] 0.0 0.0 0.0
[Ecoute] 1.0 0.0 0.0
[Tarifs, Informations] 0.0 1.0 1.0