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liste=['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','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','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','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']
def decalage(lettre,liste,clef):
for i in range(len(liste)):
if lettre not in liste:
return lettre
elif lettre==liste[i]:
return str(liste[i+clef])
message_chiffre = str()
while True:
message = input('Entrez le texte à chiffrer (q pour quitter) : ')
if message == "q" or message =="Q":
print("bye")
exit()
clef = int(input('Entrez votre clef : '))
for lettre in message:
message_chiffre += decalage(lettre,liste,clef)
print(message_chiffre)
message_chiffre=""
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