Ищю в поисковиках

file.readlines()[1:2001]

arr=[массив]
for index1 in range(len(аrr)):
  for index2 in range(len(аrr)):
    for index3 in rangе(len(аrr)):
      for index4 in range(len(аrr)):
        if arr[index1][index2] > arr[index3][index4]:
          arr[index1][index2],arr[index3][index4] = arr[index3][index4],аrr[index1][index2]

path_to_file = 'test.txt'

# генератор, за раз читаем по line_length
def read(text_file: str, line_length: int = 80):
    with open(text_file, 'r', encoding='utf-8') as text:
        line = None
        while line != '':
            line = text.read(line_length)
            yield line

def print_by_width(text_file, line_length):
    for row in read(text_file, line_length):
        print(row)

print_by_width(path_to_file, 80)

alphabet = set('abcdefghijklmnopqrstuvwxyz')
def alphabet_position(text):
    lower_text = text.lower()
    result = ''
    for char in lower_text:
        if char not in alphabet:
            result += char
    return result