dic={'1':1,'2':2,'3':3,'4':4,'5':5,'6':6,'7':7}
print [[str(key), dic[str(key)]]for key in sorted(map(int,dic.iterkeys()))[-5:] ]
ZGljPXsnMSc6MSwnMic6MiwnMyc6MywnNCc6NCwnNSc6NSwnNic6NiwnNyc6N30KcHJpbnQgW1tzdHIoa2V5KSwgZGljW3N0cihrZXkpXV1mb3Iga2V5IGluIHNvcnRlZChtYXAoaW50LGRpYy5pdGVya2V5cygpKSlbLTU6XSBdIA==
[['3', 3], ['4', 4], ['5', 5], ['6', 6], ['7', 7]]