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