d = {"schlüssel1" : "wert1", "schlüssel2" : "wert2"}
print(d["schlüssel1"])
print(d["schlüssel2"])
d["schlüssel2"] = "wert2.1"
print(d["schlüssel2"])
d["schlüssel3"] = "wert3"
print(d["schlüssel3"])
print(d)