keys, values, pop and popitem methods in dictionaries

#!/usr/bin/env python
#-*-coding:utf-8-*-
telefon_defteri={"Ahmet":"0533 123 54 58",
"Salih":"0554 258 65 78", "Selin":"0546 589 23 59"}
print telefon_defteri.keys(),"\n"
print telefon_defteri.values(),"\n"
print telefon_defteri.pop("Ahmet"),"\n"#ada gore oge siler
print telefon_defteri,"\n"
print telefon_defteri.popitem()#rastgele oge siler