Enigma Machine, I need help!

[Larz60+]

Completely rewrote rotor  class, it's not tested, but code is on github, and here:

import string
import random


class Rotor:
    def __init__(self, starting_index=0, output_encoding=None, notch_index=None):
        '''
        Initialization
        :param starting_index: optional initial starting index
        '''
        self.current_index = 0
        self.input_encoding = list(string.ascii_uppercase)
        if output_string:
            self.output_encoding = output_encoding
        else:
            self.output_encoding = random.shuffle(list(string.ascii_uppercase))
        self.index = starting_index
        self.minmax = [0, 25]
        self.notch_index = notch_index
        self.advance_next_rotor = False

    def click(self):
        '''
        rotate rotor 1 click, if notch at click set advance flag
        :return:
        '''
        self.advance_next_rotor = False
        gotnotch = None
        self.current_index += 1
        if self.current_index > self.minmax[1]:
            self.current_index = self.minmax[0]

        self.advance_next_rotor = self.notch_index and self.notch_index == self.current_index

    def get_next_char(self, char_in):
        '''
        Advance Rotor and return encoded character and advance flag
        :param char_in:
        :return:
        '''
        self.click()
        charidx = self.input_encoding.index(char_in)
        return self.output_encoding[charidx], self.advance_next_rotor

    def show_encoding(self):
        '''
        return encoding info
        :return: input encoding, output encoding, notch index
        '''
        return self.input_encoding, self.output_encoding, self.notch_index

    def test_rotor(self):
        pass

if __name__ == '__main__':
    rot = Rotor()
    rot.test_rotor()