input: Write a function to generate a random number between 0 and 9. The function should print the generated number.
  assert generate_random_number()
  assert generate_random_number()
  assert generate_random_number()
  assert generate_random_number()
  assert generate_random_number()
output: import random
  
  def generate_random_number():
      number = random.randint(0, 9)
      print(number)