Menentukan hasil penjualan tertinggi

>>> bulan = {'jan': 32, 'feb': 43, 'mar': 21}
>>> tmp = max(bulan['jan'], bulan['feb'], bulan['mar'])
>>> tmp
43
>>> for i in bulan:
...   print i
...
jan
mar
feb
>>> for i in bulan:
...   print bulan[i]
...
32
21
43
>>> for i in bulan:
...   if tmp == bulan[i]:
...     print i
...
feb