input: Write a function to generate a random 6-digit number in Python and print it.
  
  def generate_6_digit_number():
      import random
      number = random.randint(100000, 999999)
      print(number)
  
  assert type(generate_6_digit_number()) == None
  assert len(str(random.randint(100000, 999999))) == 6
output: def generate_6_digit_number():
      import random
      number = random.randint(100000, 999999)
      print(number)