New submission from Adam Carruthers:

255 is 255 -> True           (255).bit_length() -> 8
256 is 256 -> True           (256).bit_length() -> 9
257 is 257 -> False          (257).bit_length() -> 9
^
Will show True if you do it exactly like this because of a quirk.
a = 257
b = 257
a is b -> False

I think you don't want to map variables to integers direct unless they are at 
or under 8 bits in length.

----------
messages: 233145
nosy: Adam.Carruthers
priority: normal
severity: normal
status: open
title: Incorrect Integer saving
type: enhancement
versions: Python 3.6

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue23124>
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