[Python-ideas] non-Pre-PEP: Syntactic replacement of built-in pes with user-defined callables.

[Matt Chisholm]

I don't think I followed all of what you wrote.  However, it would
certainly be convenient shorthand to be able to say that, for an
entire file, program, or module, the float literal syntax created
Decimals instead.

And I can imagine cases where an entire app or module was always using
ordered dicts instead of dicts, or frozensets instead of sets.

-matt