input: Write a function to generate a random password using a set of letters, numbers, and special characters without any input. Return the generated password as a string.
  
  def generate_password():
      import random 
  
      string = "abcdefghijklmnopqrstuvwxyz01234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ!@#$%^&*()?"
      password = "".join(random.sample(string, 8))
      return password
  
  assert generate_password() != generate_password()
  assert len(generate_password()) == 8
output: def generate_password():
      import random 
  
      string = "abcdefghijklmnopqrstuvwxyz01234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ!@#$%^&*()?"
      password = "".join(random.sample(string, 8))
      return password