Enigma Program not working properly

[npd29]

Hi Everyone,
I made a program for my computer programming final that acts like the German machine "enigma" however I cannot get it to encode things properly so that they are decoded back to the original message. This is an intro to computer programming class so any help in the simplest ways possible would be great. Thanks so much!

Here's the code:

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#get input from user def main():     print("Welcome to Enigma")     plugboard = input("Enter the plugboard settings (Format: WX YZ): ")     ringSettings = input("Enter the ring setting (3 letters): ")     plaintext = input("Enter the sentence to encode or decode: ")       outcome = encode(plaintext, ringSettings, plugboard)     print(outcome)   #rotating the rotors to the correct starting place def start_rotors(stop, rotorlist, alphabet):     i = rotorlist[0]       while i != stop:         rotorlist.append(rotorlist.pop(0))         alphabet.append(alphabet.pop(0))         i = rotorlist[0]     return rotorlist     def list_plugs(plugset):     # make into a list     plugset = plugset.upper()     plugset = plugset.split()     # double and reverse the pairs so that they are encoded both ways     plugset += [x[::-1] for x in plugset]     return plugset   def sub(plugboard, plaintext):     plain_sub = []     plaintext = plaintext.upper()     plain_edit = plaintext     #for each pair, separate the first and second character     for pair in range(0, len(plugboard)):         char = plugboard[pair][0]         switch = plugboard[pair][1]         #switch each character in the plaintext that matches 'char' with 'switch         for i in range(0, len(plaintext)):             if plaintext[i] == char:                 plain_edit = plain_edit.replace(char, switch)     return plain_edit   def reflector(reflect_dict, rotors1):     reflect = reflect_dict[rotors1]     return reflect   def encode(plaintext, ringSettings, plugboard):       # Rotor 3 Substitution     rotor3 = ['B', 'D', 'F', 'H', 'J', 'L', 'C', 'P', 'R', 'T', 'X', 'V', 'Z',               'N', 'Y', 'E', 'I', 'W', 'G', 'A', 'K', 'M', 'U', 'S', 'Q', 'O']     rotor3_alpha = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',                 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']     rotor3Notch = "V"       # Rotor 2 Substitution     rotor2 = ['A', 'J', 'D', 'K', 'S', 'I', 'R', 'U', 'X', 'B', 'L', 'H', 'W',               'T', 'M', 'C', 'Q', 'G', 'Z', 'N', 'P', 'Y', 'F', 'V', 'O', 'E']     rotor2_alpha = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',                     'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']     rotor2Notch = "E"     # Rotor 1 Substitution     rotor1 = ['E', 'K', 'M', 'F', 'L', 'G', 'D', 'Q', 'V', 'Z', 'N', 'T', 'O',               'W', 'Y', 'H', 'X', 'U', 'S', 'P', 'A', 'I', 'B', 'R', 'C', 'J']     rotor1_alpha = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',                     'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']     rotor1Notch = "Q"     # Reflector     reflect_dict = {'A': 'Y', 'B': 'R', 'C': 'U', 'D': 'H', 'E': 'Q', 'F': 'S', 'G': 'L',                     'H': 'D', 'I': 'P', 'J': 'X', 'K': 'N', 'L': 'G', 'M': 'O', 'N': 'K',                     'O': 'M', 'P': 'I', 'Q': 'E', 'R': 'B', 'S': 'F', 'T': 'Z', 'U': 'C', 'V': 'W',                     'W': 'V', 'X': 'J', 'Y': 'A', 'Z': 'T'}     alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"     #rotor1_start = ringPositions[0]     #rotor2_start = ringPositions[1]     #rotor3_start = ringPositions[2]       ringSettings = ringSettings.upper()         rotor1_start = ringSettings[0]     rotor2_start = ringSettings[1]     rotor3_start = ringSettings[2]         rotor1 = start_rotors(rotor1_start, rotor1, rotor1_alpha)     rotor2 = start_rotors(rotor2_start, rotor2, rotor2_alpha)     rotor3 = start_rotors(rotor3_start, rotor3, rotor3_alpha)       plugboard = list_plugs(plugboard)     plaintext = sub(plugboard, plaintext)       rotors_output = []       count3 = 0     count2 = 0     for i in range(0, len(plaintext)):           #dont try to encode the spaces or other characters         if plaintext[i] in rotor1_alpha:               rotor3.append(rotor3.pop(0))             rotor3_alpha.append(rotor3_alpha.pop(0))             if plaintext[i] == rotor3Notch:                 rotor3.append(rotor3.pop(0))                 rotor3_alpha.append(rotor3_alpha.pop(0))             if plaintext[i] == rotor2Notch:                 rotor2.append(rotor2.pop(0))                 rotor2_alpha.append(rotor2_alpha.pop(0))             if plaintext[i] == rotor1Notch:                 rotor1.append(rotor1.pop(0))                 rotor1_alpha.append(rotor1_alpha.pop(0))                 rotor2.append(rotor2.pop(0))                 rotor2_alpha.append(rotor2_alpha.pop(0))               place = rotor3_alpha.index(plaintext[i])             rotors3value = rotor3[place]             place = rotor2_alpha.index(rotors3value)             rotors2value = rotor2[place]             place = rotor1_alpha.index(rotors2value)             rotors1 = rotor1[place]               # reflect the letter to change it and then put it back through the rotors             reflected = reflector(reflect_dict, rotors1)             place = rotor1.index(reflected)             rotors1 = rotor1_alpha[place]             place = rotor2.index(rotors1)             rotors2 = rotor2_alpha[place]             place = rotor1.index(rotors2)             rotors3 = rotor3_alpha[place]             rotors_output.append(rotors3)       rotors_output = ''.join(rotors_output)           rotors_output = sub(plugboard, rotors_output)       return rotors_output   def list_plugs(plugset):     # make into a list     plugset = plugset.upper()     plugset = plugset.split()     # double and reverse the pairs so that they are encoded both ways     plugset += [x[::-1] for x in plugset]     return plugset   main()

[pyzyx3qwerty]

So, where exactly are you going wrong?

[Larz60+]

main already has print statements, ans is called at end of script.

[pyzyx3qwerty]

main already has print statements, ans is called at end of script.

I saw that, and changed the post.