# Подсчёт прослушиваний в каждом городе df_Moscow = df[df['city'] == 'Moscow'] df_SaintPetersburg = df[df['city'] == 'Saint-Petersburg'] track_Moscow = df_Moscow.groupby('city')['track'].count() track_SaintPetersburg = df_SaintPetersburg.groupby('city')['track'].count() print(track_Moscow) print(track_SaintPetersburg)