input: 
  from typing import List
  
  def generate_random_number(output: List[int]) -> None:
      """ Generate a random number between 0 and 9 and store it in the given output list.
      >>> output = []
      >>> generate_random_number(output)
      >>> print(output[0])
      7
      """
      import random
      output.append(random.randint(0, 9))
  
output:     import random
      output.append(random.randint(0, 9))