'==' vs. 'is' behavior

Oleg Broytmann phd at phd.russ.ru
Fri Nov 12 16:28:48 CET 1999


On Fri, 12 Nov 1999, Andy Fox wrote:
> >>> a is b #are they the same object? yes.  Why?
> 1
> 
> Further experimentation shows that this seems to work for integers
> through 99, but that starting with 100 the results of the 'is' test
> return 0, as I would expect.

   I believe intergers 0 through 99 are preallocated by Python interpreter
to speed up common things like "x = y + 12".

Oleg.
---- 
    Oleg Broytmann      Foundation for Effective Policies      phd at phd.russ.ru
           Programmers don't die, they just GOSUB without RETURN.





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