salut

code={"A":"D",
      "B":"E",
      "C":"F",
      "D":"G",
      "E":"H",
      "F":"I",
      "G":"J",
      "H":"K",
      "I":"L",
      "J":"M",
      "K":"N",
      "L":"O",
      "M":"P",
      "N":"Q",
      "O":"R",
      "P":"S",
      "Q":"T",
      "R":"U",
      "S":"V",
      "T":"W",
      "U":"X",
      "V":"Y",
      "W":"Z",
      "X":"A",
      "Y":"B",
      "Z":"C",}
print(code)
msg ="BONJOUR"
msg_cesar = ""
for i in range(len(msg)):
    msg_cesar = msg_cesar + code[msg[i]]
print(msg_cesar)


d = {"orange":10,"mangue":7,"pommes":4}
for cle in d.keys():
    print(cle)

for val in d.values():
    print(val)

for item in d.items():
    print(item)



note = {"NSI":10,"SES":12,"MATHS":10}
for cle in note.keys():
    print(cle)

for val in note.values():
    print(val)

for item in note.items():
    print(item)







pays= {"France":{"Pop":66992699,"Sup":551695},
       "Italie":{"Pop":10752660,"Sup":131957},
       "Grece":{"Pop":60494785,"Sup":301336}}
print(pays)


print(pays["Grece"]["Pop"])
print(pays["France"]["Sup"])



for cle in pays.keys():
    print(cle)
    pays[cle]["dens"] =pays[cle]["Pop"]//pays[cle]["Sup"]
print(pays)