My one comment about this is to quote from PEP 20, the Zen of Python
There should be one-- and preferably only one --obvious way to do it.
Yes, this does get broken at times with additions to the language, But this whole proposal to me seems to be an effort to introduce an alternate way to do something that can be fairly easily done with basic syntax. Yes, maybe in some cases, the existing syntax has a lot of boiler plate overhead (all those quotes, what a mess), but we also have from the Zen
Special cases aren't special enough to break the rules.
Which I think is also applicable.
It isn't that Python users can't learn a new special syntax, the question comes should they. What does this idea let you do in Python that you COULDN'T do before.
Python is its own language, it doesn't need to import all the little tricks of all the other languages.