John Salerno wrote:
> Is there a way to assign multiple variables to the same value,
> but so
> that an identity test still evaluates to False?
re-phrase it according to how Python works, and you'll get the answer:
"Is there a way to bind multiple names to the same object, but so the
identity of this object is different from the identity of this object ?"
> e.g.:
>
>>>> w = x = y = z = False
the statement:
a = False
doesn't mean "assign the value False to the variable a", but "make the
name 'a' reference the object False" - which is quite different.
>>> a = False
>>> b = False
>>> a is b
True
>>> id(False)
46912499309888
>>> id(a)
46912499309888
>>> id(b)
46912499309888
>>>
>>>> w
> False
>>>> x
> False
>>>> w == x
> True
>>>> w is x
> True # not sure if this is harmful
Using identity test for boolean tests is usually not a good idea since
many other objects evals to True or False in a boolean context while not
being neither the True nor the False objects.
> The first line above is the only way I know to do it, but it seems to
> necessarily lead to the true identity test.
It does.
Now if I may ask: what is your actual problem ?
--
bruno desthuilliers
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