input: Write a function to generate a random password. The function should generate a string of 8 characters, consisting of numbers, letters, and special characters. If no input is provided, the function should print the generated password.
  def generate_password():
   password_characters = string.ascii_letters + string.digits + string.punctuation
   password = ''.join(random.choice(password_characters) for i in range(8))
   print(password)
  assert generate_password()  # the generated password should be a string of 8 characters
  assert len(generate_password())==8  # the length of the generated password should be 8
output: def generate_password():
   password_characters = string.ascii_letters + string.digits + string.punctuation
   password = ''.join(random.choice(password_characters) for i in range(8))
   print(password)