input: from typing import Callable
  
  def generate_password() -> str:
      """
      Generates a random password string consisting of 8 characters which may include numbers, letters, and special characters.
  
      Examples:
      >>> password = generate_password()
      >>> len(password) == 8 and any(c.isdigit() for c in password) and any(c.isalpha() for c in password) and any(not c.isalnum() for c in password)
      True
      >>> password = generate_password()
      >>> len(password) == 8 and any(c.isdigit() for c in password) and any(c.isalpha() for c in password) and any(not c.isalnum() for c in password)
      True
      """
      import random
      import string
      password_characters = string.ascii_letters + string.digits + string.punctuation
      password = ''.join(random.choice(password_characters) for i in range(8))
      return password
output:     import random
      import string
      password_characters = string.ascii_letters + string.digits + string.punctuation
      password = ''.join(random.choice(password_characters) for i in range(8))
      return password