Why is there no natural syntax for accessing attributes with names not being valid identifiers?

[Chris Angelico]

On Wed, Dec 4, 2013 at 9:09 PM, rusi <rustompmody at gmail.com> wrote:
> OP wants attribute identifiers like outer_fieldset-inner_fieldset-third_field.
> Say I have a python expression:
> obj.outer_fieldset-inner_fieldset-third_field

I don't think so. What the OP asked for was:

my_object.'valid-attribute-name-but-not-valid-identifier'

Or describing it another way: A literal string instead of a token.
This is conceivable, at least, but I don't think it gives any
advantage over a dictionary.

What you could do, though, is create a single object that can be
indexed either with dot notation or as a dictionary. For that to work,
there'd have to be some restrictions (eg no leading underscores - at
very least, __token__ should be special still), but it wouldn't be
hard to do - two magic methods and the job's done, I think; you might
even be able to manage on one. (Code golf challenge, anyone?) Of
course, there's still the question of whether that even is an
advantage.

ChrisA