input: 
  import random
  import string
  
  def generate_password():
      """
      Generates a random password consisting of 8 characters, including numbers, letters, and special characters.
      >>> generate_password()
      'A3@f&7G!'
      >>> generate_password()
      '*B9g#d3Q'
      """
      password_characters = string.ascii_letters + string.digits + string.punctuation
      password = ''.join(random.choice(password_characters) for i in range(8))
      print(password)
  
  generate_password()
  
output:     return password