opened_file = open('AppleStore.csv')
from csv import reader
read_file = reader(opened_file)
apps_data = list(read_file)

rating_sum = 0
for row in apps_data[1:]:
    rating = float(row[7])
    rating_sum = rating_sum + rating
    
avg_rating = rating_sum / len(apps_data[1:])
print(avg_rating)