On 04/28/2018 10:16 AM, Tim Peters wrote:
... but do realize that since PEP 572 dropped any
notion of sublocal scopes, that recurring issue remains wholly
unaddressed regardless.
If we need a sublocal scope, I think the most Pythonic* route to have it would
be:
with sublocal():
blah blah
which would act just like local/global does now:
- any assignment creates a new variable
- unless that variable has been declared global/nonlocal
- plain reads (no assignment ever happens) refer to nonlocal/global/built-in
names
This has the advantages of:
- no confusion about which variables are sublocal (acts like a new function
scope)
- no extra parens, assignments, expressions on "with sublocal():" line
Possible enhancements:
- give sublocal block a name "with sublocal() as blahblah:" and then reuse
that block
again later ("with blahblah:") or maybe pass it to other functions...
Of course, as previously stated, this is orthogonal to PEP 572.
--
~Ethan~
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