On Wed, Nov 01, 2006 at 12:20:36PM -0800, SpreadTooThin wrote:
>
> Bruno Desthuilliers wrote:
> > Nick Vatamaniuc a �crit :
> > (snip)
> > > In Python all the primitives are copied and all other entities are
> > > references.
> >
> > Plain wrong. There's no "primitives" (ie : primitive data types) in
> > Python, only objects. And they all get passed the same way.
>
> so..
> def fn(x):
> x = x + 1
> print x
>
> a = 2
> fn(a)
> fn(2)
>
> Wouldn't you say that this is being passed by value rather than by
> refrence?
>
What you're confused with is assignment. Check this example;
>>> def f(x):
... print id(x)
... x = x + 1
... print id(x)
...
>>> f(1234)
1617596
1617608
>>> a = 5678
>>> id(a)
1617596
>>> f(a)
1617596
1617620
>>>
You can assume id() as a memory address. Is it call-by-value?
-- Inyeol Lee
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