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Created on 2014-12-28 01:48 by Adam.Carruthers, last changed 2022-04-11 14:58 by admin. This issue is now closed.
| Messages (2) | |||
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| msg233145 - (view) | Author: Adam Carruthers (Adam.Carruthers) | Date: 2014-12-28 01:48 | |
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. |
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| msg233146 - (view) | Author: Ezio Melotti (ezio.melotti) *  |
Date: 2014-12-28 01:59 | |
On CPython small ints are cached to improve performances. This is an implementation detail and "is" should not be used to compare ints (== should be used instead). |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:11 | admin | set | github: 67313 |
| 2014-12-28 01:59:16 | ezio.melotti | set | status: open -> closed type: enhancement -> behavior nosy: + ezio.melotti messages: + msg233146 resolution: not a bug stage: resolved |
| 2014-12-28 01:48:35 | Adam.Carruthers | set | nosy:
- Adam.Carruthers -> (no value) |
| 2014-12-28 01:48:19 | Adam.Carruthers | create | |