pymotw-ja / PyMOTW / doctest / doctest_hashed_values.py

#!/usr/bin/env python
# encoding: utf-8
#
# Copyright (c) 2010 Doug Hellmann.  All rights reserved.
#
"""Demonstrate how insertion order affects dictonaries and sets.
"""
#end_pymotw_header

keys = [ 'a', 'aa', 'aaa' ]

d1 = dict( (k,len(k)) for k in keys )
d2 = dict( (k,len(k)) for k in reversed(keys) )

print
print 'd1:', d1
print 'd2:', d2
print 'd1 == d2:', d1 == d2

s1 = set(keys)
s2 = set(reversed(keys))

print
print 's1:', s1
print 's2:', s2
print 's1 == s2:', s1 == s2
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