text_html_output_1.png
import matplotlib.pyplot as plt

import pandas as pd # data processing, CSV file I/O (e.g. pd.read_csv)

import seaborn as sns

df = pd.read_csv('/kaggle/input/russian-passenger-air-service-20072020/russian_passenger_air_service_2.csv')

df_y = df.groupby('Year')

df_ys = df_y.sum().drop('Whole year', axis=1)
df_ys

plt.figure(figsize=(12, 10))
sns.heatmap(df_ys / 1000000, annot=True)
plt.title('Tot Pax Number per month')