#!/usr/bin/python
# coding: utf8

import pickle
import sys

contenu = {}
new = {}
statut = True

def charger(fic):
	global contenu
	try:
		with open(fic, "rb") as fichier:
			loader = pickle.Unpickler(fichier)
			contenu = loader.load()
	except:
		contenu = {}

def sauver(fic):
	with open(fic, "wb") as fichier:
			saver = pickle.Pickler(fichier)
			saver.dump(contenu)

if (len(sys.argv) is 4):
	fic=sys.argv[1]
	salon_orig=sys.argv[2]
	salon_dst=sys.argv[3]
	charger(fic)
	try:
		for cle,valeur in contenu.items():
			if (cle[0] == salon_orig):
				mod=cle[1]
				print(str(salon_orig) + ":" + str(mod))
				new[salon_dst,mod] = valeur
			else:
				new[cle] = valeur
	except Exception as err:
		print(err)
		statut = False

	if (statut):
		contenu = new
		sauver(fic)
else:
	print("lecture.py <fichier> <salon_orig> <salon_dest>")