def filter_by_year(data, begin, end):
    result = []
    for row in data:
        year = row[1]
        if begin <= year < end:
            result.append(row)
    return result

def column_sum(data, column):
    result = 0
    for row in data:
        result += row[column]
    return result

def column_mean(data, column):
    total = column_sum(data, column)
    mean = total / len(data)
    return mean

def add_price_per_minute(data):
    for i in range(len(data)):
        length = data[i][3]
        budget = data[i][5]
        price_per_minute = budget / length
        data[i].append(price_per_minute)

add_price_per_minute(oscar_data)

years = [[1988, 1998], [1998, 2008], [2008, 2018]]

rows = []
for begin_end in years:
    # извлекаем начало и конец промежутка
    begin = begin_end[0]
    end = begin_end[1]
    # создаем текстовую запись промежутка
    name = '{}-{}'.format(begin, end)

    # отфильтруйте таблицу по промежутку
    # < напишите код здесь >
    filtered_data = filter_by_year(oscar_data, begin, end)
    mean_score = column_mean(filtered_data, 2)
    mean_length = column_mean(filtered_data, 3)
    mean_ppm = column_mean(filtered_data, 7)
    mean_gross = column_mean(filtered_data, 6)
    rows.append([name, mean_score, mean_length, mean_ppm, mean_gross])


print('Годы      | Рейтинг | Длина  | Бюджет за минуту | Сборы ')
print('--------------------------------------------------------')
for row in rows:
    print('{: <9} | {: >7.2f} | {: >5.2f} | {: >16.2f} | {: >6.2f}'.format(
        row[0], row[1], row[2], row[3], row[4]))