input: 
  def generate_password():
      """ Generates a random password of 8 characters, including numbers, letters, and special characters.
      >>> generate_password()
      'A7b!2x@_'
      """
      import random
      import string
      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