input: import string
  import random
  
  def generate_password():
   """ Generate a random password with a minimum length of 8 characters.
   The password should contain at least one number and one special character.
   >>> import string
   >>> import random
   >>> chars = string.ascii_letters + string.digits + string.punctuation
   >>> password = generate_password()
   >>> len(password) >= 8 and any(char in password for char in string.digits) and any(char in password for char in string.punctuation)
   True
   """
   length = 8
   chars = string.ascii_letters + string.digits + string.punctuation
   password = "".join(random.choice(chars) for i in range(length))
   
   return password
output:     while not (any(char in password for char in string.digits) and any(char in password for char in string.punctuation)):
          password = "".join(random.choice(chars) for i in range(length))
      return password