Generateur code barre en code 39

Bonjour, je cherche à realiser un code python, qui va demander à un utilisateur de rentrer la valeur du code barre et de le traduire en un code barre code 39, j'ai deja commencé par faire ca, mais apres je bloque completement ! si quelqu'un pourrait m'aider, ca serait cool ! Merci beaucoup

from tkinter import *

def carac_binaire (t):
    if t=='A':
        return [1,0,0,0,0,1,0,0,1]
    if t=='B':
        return [0,0,1,0,0,1,0,0,1]
    if t=='C':
        return [1,0,1,0,0,1,0,0,0]
    if t=='D':
        return [0,0,0,0,1,1,0,0,1]
    if t=='E':
        return [1,0,0,0,1,1,0,0,0]
    if t=='F':
        return [0,0,1,0,1,1,0,0,0]
    if t=='G':
        return [0,0,0,0,0,1,1,0,1]
    if t=='H':
        return [1,0,0,0,0,1,1,0,0]
    if t=='I':
        return [0,0,1,0,0,1,1,0,0]
    if t=='J':
        return [0,0,0,0,1,1,1,0,0]
    if t=='K':
        return [1,0,0,0,0,0,0,1,1]
    if t=='L':
        return [0,0,1,0,0,0,0,1,1]
    if t=='M':
        return [1,0,1,0,0,0,0,1,0]
    if t=='N':
        return [0,0,0,0,1,0,0,1,1]
    if t=='O':
        return [1,0,0,0,1,0,0,1,0]
    if t=='P':
        return [0,0,1,0,1,0,0,1,0]
    if t=='Q':
        return [0,0,0,0,0,0,1,1,1]
    if t=='R':
        return [1,0,0,0,0,0,1,1,0]
    if t=='S':
        return [0,0,1,0,0,0,1,1,0]
    if t=='T':
        return [0,0,0,0,1,0,1,1,0]
    if t=='U':
        return [1,1,0,0,0,0,0,0,1]
    if t=='V':
        return [0,1,1,0,0,0,0,0,1]
    if t=='W':
        return [1,1,1,0,0,0,0,0,0]
    if t=='X':
        return [0,1,0,0,1,0,0,0,1]
    if t=='Y':
        return [1,1,0,0,1,0,0,0,0]
    if t=='Z':
        return [0,1,1,0,1,0,0,0,0]
    if t=='O':
        return [0,0,0,1,1,0,1,0,0]
    if t=='1':
        return [1,0,0,1,0,0,0,0,1]
    if t=='2':
        return [0,0,1,1,0,0,0,0,1]
    if t=='3':
        return [1,0,1,1,0,0,0,0,0]
    if t=='4':
        return [0,0,0,1,1,0,0,0,1]
    if t=='5':
        return [1,0,0,1,1,0,0,0,0]
    if t=='6':
        return [0,0,1,1,1,0,0,0,0]
    if t=='7':
        return [0,0,0,1,0,0,1,0,1]
    if t=='8':
        return [1,0,0,1,0,0,1,0,0]
    if t=='9':
        return [0,0,1,1,0,0,1,0,0]
    if t=='espace':
        return [0,1,1,0,0,0,1,0,0]
    if t=='tiret':
        return [0,1,0,0,0,0,1,0,1]
    if t=='dollar':
        return [0,1,0,1,0,1,0,0,0]
    if t=='pourcentage':
        return [0,0,0,1,0,1,0,1,0]
    if t=='point':
        return [1,1,0,0,0,0,1,0,0]
    if t=='diviser':
        return [0,1,0,1,0,0,0,1,0]
    if t=='plus':
        return [0,1,0,0,0,1,0,1,0]
    if t=='*':
        return [0,1,0,0,1,0,1,0,0]