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Trouble when overloading operator[ ]

david_ullrich at my-deja.com david_ullrich at my-deja.com
Fri Jul 21 11:33:12 EDT 2000 
In article <LBGd5.1837$6E.377728 at ptah.visi.com>,
  ge at nowhere.none (Grant Edwards) wrote:
> In article <8l76hm$pm9$1 at nnrp1.deja.com>, david_ullrich at my-deja.com
wrote:
>
> >   You can use the notation [2,3] to accomplish the same
> >thing: it appears that if you use multiple indices they
> >get passed as a tuple to __getitem__:
>
> You're not using multiple indices.
>
> You're using a single index whose value is the expression 2,3.
> The expression 2,3 evaluates to a tuple, which is passed to
> _getitem__, just as would the value of any other expression
> used as an index.

  Ok, then I should revise what I said: You can use the
notation [2,3] to accomplish the same thing.

  No doubt you're exactly right. But evidently there's a
difference between [] indices and function parameters here:

def hmm(x):
	return x

print hmm(2,3)

gives an error (hence my suspicion that someone might
expect whatever[2,3] to give an error without trying it...)

  Why is "2,3" a single expression in whatever[2,3]
but not in hmm(2,3)?

> --
> Grant Edwards                   grante             Yow!  My Aunt
MAUREEN was
>                                   at               a military advisor
to IKE &
>                                visi.com            TINA TURNER!!
>


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