Problème pendu...

#Imports
from random import choice

#Initialisation variables importantes
letter = ""

#Mots pendu
def getWords():
    wordsList = [
    "peinture",
    "ecran",
    "montagne",
    "carte",
    "python",
    "balle",
    "clavier",
    "espoir",
    "volant",
    "carton",
    "couteau",
    "fiche",
    "feuille",
    "travail",
    "sciences",
    "scandale",
    "canard",
    "utile",
    ]
    return wordsList

#Permet d'obtenir un mot random
def pickWord():
    return choice(getWords())

#Récupération des  entrées de l'utilisateur
def GetLettre():
    lettre = input("Tapez une lettre: ")
    lettre = lettre.lower()
    if (len(lettre) > 1 or not lettre.isalpha()):
        return GetLettre()
    else:
        return lettre
#Obtention du mot en partie trouvé
def getMaskedWord(word, foundLettres, testLettre):
    maskedWord = ""
    for lettre in word:
        if testLettre in word:
            maskedWord += foundLettres
        else:
            maskedWord+="*"
    return maskedWord

#Initialisation
def main(word):
    b = True
    while (b ==True):
        letter+=GetLettre() #Erreur ici
        print("Mot: ", getMaskedWord(word, letter))
        main()

#Variabled + start
word = pickWord()
main(word)