On Thu, Aug 27, 2020 at 10:15 AM Stephen J. Turnbull <turnbull.stephen.fw@u.tsukuba.ac.jp> wrote:
Alex Hall writes:
 > On Wed, Aug 26, 2020 at 5:00 PM Stephen J. Turnbull <
 > turnbull.stephen.fw@u.tsukuba.ac.jp> wrote:
 >
 > > If the "keyword arguments in __getitem__" feature is added, .get() is
 > > purely redundant.  (Of course this thread would then become "make
 > > 'default' a standard keyword argument for mutable collections.")
 > >
 >
 > Is that something people want to do? Do people want to be able to
 > write `my_dict[key, default=0]` instead of `my_dict.get(key, 0)`?
 > What about `my_dict[key, default=None]` instead of `my_dict.get(key)`?

Of course they don't want to do that.  Of course dict.get is going
nowhere.  Of course that's redundant.  Of course if collections get a
standard 'default' for __getitem__, many people *will* start writing
`my_dict[key, default=None]`, if only because they don't read enough
docs to know about dict.get.

OK, I'll try again. Do people want collections to get a standard 'default' for `__getitem__`?

I don't want mappings to grow a second way to do the same thing, and I don't want sequences to have a different way to do it from mappings.