#!/usr/local/bin/python3.4

# The directive above is for a user-installed Python on Mac OS X.
# With the pre-installed Python (older version), or on Linux, you
# probably want /usr/bin/python or something similar.

dict01 = {}
dict01[2] = 10
dict01[3] = 5
dict01['2'] = dict01

dict02 = {}
dict02[2] = dict01
dict02[3] = 4
dict02['2'] = dict02

print( dict02['2']['2'][2][2] )