Василий Никонов

array = list()
for x in root.xpath('.//tr'):
    a = x.xpath('.//td[2]')[0].text
    b = x.xpath('.//td[4]')[0].text
    array.append([a, b])

find ./directory -name "*.avi" -o -name "*.mkv" -exec ffmpeg -i {} {}.mp4  \;

row = [ 2, 3, 7, 9 ]
num_rows = 5

matrix = [ [ f'Ряд {i + 1}, число {item}' for item in row ] for i in range(num_rows) ]

schedule = {
    '1': '9:40 - 10:30',
    '2': '10:40 - 12:10',
    '3': '12:50 - 14:20',
    '4': '14:30 - 16:00'
}
array = [i.replace(f'{i[0]}-ая пара', schedule[i[0]]) for i in array]