On Fri, Aug 28, 2020 at 4:30 AM Stephen J. Turnbull <
[email protected]> wrote:
> > tuple, or dict themselves. So `mylist[99, default=4]` would still
> > be a syntax error (or maybe a different exception).
>
> I don't think it can be a SyntaxError because you can't always know
> that mylist is a builtin list. list.__getitem__(self, ...) gets
> called and it tells you "TypeError: __getitem__() takes no keyword
> arguments", as it does now. (Just for the record. I bet you realized
> that within nanoseconds of hitting "send". ;-)
>
I'm not nearly so clever :-).
I was thinking, hypothetically, that it's possible for dict.__getitem__()
to have code along the lines of:
def __getitem__(self, index, **kws):
if kws:
raise SyntaxError("Keywords not allowed in dictionary index")
# ... actual item getting ...
I'm not saying that's a good idea per se. Hence my parenthetical.
Probably any extra check on every dict access is a needless slowdown
though. I only thought of it because `mydict[foo=bar]` now raises a
SyntaxError, so raising something different would technically be a change
in behavior.
How do you folks feel about list.get and tuple.get (I expect many
> folks will think differently about these because tuples are
> immutable), and more generally Sequence.get?
>
-1 on Sequence.get. -0.5 on tuple.get.
--
The dead increasingly dominate and strangle both the living and the
not-yet born. Vampiric capital and undead corporate persons abuse
the lives and control the thoughts of homo faber. Ideas, once born,
become abortifacients against new conceptions.
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