input: 
  import random
  import string
  
  def generate_password():
      """ Generate a random password of 8 characters, consisting of numbers, letters, 
      and special characters. Print the generated password.
      >>> generate_password()
      'aB3$d9#2'
      """
      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:     password_characters = string.ascii_letters + string.digits + string.punctuation
      password = ''.join(random.choice(password_characters) for i in range(8))
      print(password)