Raymond Hettinger <[email protected]> added the comment:
Guys, let's be careful. Make sure that efforts to randomize lower bits
don't destroy information. Something like x |= x>>8 is reversible and
fast. Other fun looking transformations are not:
>>> len(set((x >> 4) + (x & 15) for x in range(10**6)))
62515
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Python tracker <[email protected]>
<http://bugs.python.org/issue5186>
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