Explanation of list reference
Ben Finney
ben+python at benfinney.id.au
Sat Feb 15 01:19:38 EST 2014
Rustom Mody <rustompmody at gmail.com> writes:
> Then you are obliged to provide some other way of understanding
> object-identity
How about: Every object has an identity, which is unique among all
concurrently-existing objects. The ‘is’ operator queries whether two
references are referring to objects with the same identity, which
implies they are actually referring to the same object.
Is that sufficient?
> I earlier talked of the macro problems of identity, viz across
> machines.
Python doesn't make any promises about object identity beyond the
current run-time of a single instance of a program. So while the problem
you describe is interesting, it isn't relevant when talking about Python
object identity.
--
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Ben Finney
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