On Mon, 24 Jan 2005 18:45:46 +0100
"Fredrik Lundh" <[EMAIL PROTECTED]> wrote:
> George Sakkis wrote:
>
> > Why does slicing a tuple returns a new tuple instead of a view of
> > the existing one, given that tuples are immutable ?
>
> really?
Well... seems like this case is optimized to return the original tuple
just incrementing its reference count and returning
tupleobject.c, 330-335
if (ilow == 0 && ihigh == a->ob_size && PyTuple_CheckExact(a)) {
Py_INCREF(a);
return (PyObject *)a;
}
>
> >>> a = 1, 2, 3
> >>> b = a[:]
> >>> a is b
> True
>
> </F>
>
>
>
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