Error in making instance of class and calling a member function

#1

import random
class Password():

list_digit=['1','2','3','4','5','6','7','8','9']
list_alpha=['a','b','c','d','e','f','g','h','i']
list_character=['!','@','#','$','%']


def makepass11():
        element1=random.choice(list_digit)
        element2=random.choice(list_alpha)
        element3=random.choice(list_character)
        element4=random.choice(list_digit)
        element5=random.choice(list_alpha)
        element6=random.choice(list_character)
        element7=random.choice(list_digit)
        element8=random.choice(list_alpha)
        element9=random.choice(list_character)
        element10=random.choice(list_digit)
        element11=random.choice(list_alpha)
        element12=random.choice(list_character)
        return element1+element2+element3+element4+element5+element6+element7+element8+element9+element10+element11+element12

firstpass=Password()
firstpass.makepass11()

The error I am getting is:
“Traceback (most recent call last):
File “script.py”, line 25, in
firstpass.makepass11()
TypeError: makepass11() takes 0 positional arguments but 1 was given”