input: from typing import List
  
  def generate_6_digit_number() -> int:
      """ Generate a random 6-digits number.
      >>> generate_6_digit_number()
      123456
      >>> generate_6_digit_number()
      789012
      """
      import random
      return random.randint(100000, 999999)
output:     import random
      return random.randint(100000, 999999)