input: Write a function to generate a random number between 0 and 9 that is divisible by 3. If no such number can be generated within a reasonable number of attempts, return None.
  def generate_random_divisible_number():
      import random
      attempts = 0
      max_attempts = 100  # Define a max number of attempts
      while attempts < max_attempts:
          # Generate a random number
          process = random.randint(0, 9)
          # Check if the number is divisible by 3
          if process % 3 == 0:
              # If it is divisible, return it
              return process
          attempts += 1
      return None
  assert generate_random_divisible_number() in [0, 3, 6, 9]
  assert generate_random_divisible_number() in [0, 3, 6, 9]
  assert generate_random_divisible_number() in [0, 3, 6, 9]
output: def generate_random_divisible_number():
      import random
      attempts = 0
      max_attempts = 100  # Define a max number of attempts
      while attempts < max_attempts:
          # Generate a random number
          process = random.randint(0, 9)
          # Check if the number is divisible by 3
          if process % 3 == 0:
              # If it is divisible, return it
              return process
          attempts += 1
      return None