input: Write a function to generate a random password with a minimum length of 8 characters, containing at least one number and one special character.
  
  def generate_password():
   length = 8
   chars = string.ascii_letters + string.digits + string.punctuation
   while True:
       password = "".join(random.choice(chars) for i in range(length))
       if any(char.isdigit() for char in password) and any(char in string.punctuation for char in password):
           break
   return password
  
  assert len(generate_password()) >= 8
  assert any(char.isdigit() for char in generate_password())
  assert any(char in string.punctuation for char in generate_password())
output: import random
  import string
  
  def generate_password():
      length = 8
      chars = string.ascii_letters + string.digits + string.punctuation
      while True:
          password = "".join(random.choice(chars) for i in range(length))
          if any(char.isdigit() for char in password) and any(char in string.punctuation for char in password):
              break
      return password