On 14Apr2020 21:25, Guido van Rossum <gu...@python.org> wrote:
On Tue, Apr 14, 2020 at 9:08 PM Raymond Hettinger <
raymond.hettin...@gmail.com> wrote:
[GvR]
> We should not try to import JavaScript's object model into Python.
Yes, I get that. Just want to point-out that working with heavily nested
dictionaries (typical for JSON) is no fun with square brackets and
quotation marks.
Yeah, I get that too. So maybe this should be limited to JSON? Could the
stdlib json library be made to return objects that support this (maybe with
an option)?
I find this feels slightly special purpose. Though admirably restrained.
I think I dislike the need to detour thorough the json module to get
such a feature.
Like many others, I recently implemented one of these
__getattr__+__getitem__ SimpleNamespaces. I'm hacking on some mappings
which map dotted-names to values. So the natural implementation is
dicts or dict subclasses. But I'm also feeding these to format strings,
so I want to write:
"Hi {dotted.name}"
so I've made a nesting of SimpleNamespace so that I can use nice dotted
a.b.c.d type names in the format string. And because I'm using
.format_map, the top level namespace also supports __getitem__.
Now, my dict subclass has a .ns() method returning one of the above
SimpleNamespace subclasses, but I can readily imagine a utility function
in collection that made such a thing.
Restricting that to only work via some contrived path through the JSON
module seems... clunky.
Cheers,
Cameron Simpson <c...@cskk.id.au>
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