Why this difference?
Paul Anton Letnes
paul.anton.letnes at gmail.com
Thu Feb 24 07:58:28 EST 2011
Den 24.02.11 13.41, skrev n00m:
> The 1st "False" is not surprising for me.
> It's the 2nd "True" is a bit hmmm... ok, it doesn't matter
> ======================
> Have a nice day!
I am no expert, but I think python re-uses some integer and string
objects. For instance, if you create the object int(2) it may be re-used
later if you have several 2 objects in your code. This is to save some
memory, or some other performance hack. Don't rely on it.
For instance:
>>> a = 100
>>> b = 100
>>> a is b
True
>>> a = 2**60
>>> b = 2**60
>>> a is b
False
Strange, but it's just like this!
Paul
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