Task #1

import pandas as pd
data_final = pd.read_csv('/datasets/data_final.csv')
#print(data_final.columns)
data_pivot = data_final.pivot_table(index=['category_name', 'subcategory_name'], columns='source', values='visits', aggfunc='sum')#построение сводной таблицы
print(data_pivot.head(10))