Interesting behaviour of the assignment

Oleg Broytmann phd at phd.pp.ru
Thu Dec 28 15:15:05 CET 2000


On Thu, 28 Dec 2000, June Kim wrote:
> >>> a=100
> >>> b=100
> >>> a is b
> 0
> >>> a=99
> >>> b=99
> >>> a is b
> 1
>
> Is this an intended/expected result? What is the lying structure beneath
> this?

   First 100 integers (0-99) are preallocated by interpreter. So every time
you use it - the same object is used. All other integers are allocated anew
every time.

Oleg.
----
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.





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