This unexpected behavior surprised me:
>>> a = 256
>>> a is 256
True
>>> b = 257
>>> b is 257
False
Why is that?
Asked
Active
Viewed 35 times
1
Thyrst'
- 2,253
- 2
- 22
- 27
-
1Because `int` up to 256 are cached: for larger ones a *new* object is constructed. – Willem Van Onsem Apr 07 '17 at 08:24
-
1Looks like it's been already answered elsewhere. Thanks for quick answer anyway :) – Thyrst' Apr 07 '17 at 08:27
-
Note that you should be comparing integer values by equality (`==`) not identity (`is`). – jonrsharpe Apr 07 '17 at 09:20