Dear Developers,
Some of you may have noticed I updated my proposal on the subject
yesterday. I'm afraid it was too long without a summary, so here is
one. I hope this will be helpful to some people.
Summary of the refreshed proposal
---------------------------------
(1) Simplify the syntax:
We wouldn't need the notion of expression list any more, and would
be able to use starred expressions at more places.
(2) Simplify the syntax about subscription and slicing:
A simple new rule describes a well expectable interpretation of
natural but currently invalid expressions (mainly those involving
stars) which extends the already given interpretation of already
valid expressions.
(3) There's a difference from PEP 646:
Unlike with PEP 646, we won't have e.g.,
a[*[y]]
as a valid expression which is _not_ equivalent to
a[y]
The origianal post (sorry about its length) can be found at
https://mail.python.org/archives/list/[email protected]/message/BEGGQEU6MG7RYIY7HB4I6VQ23L6TXB6H/
as well as the entire thread at
https://mail.python.org/archives/list/[email protected]/thread/V2WFMNVJLUBXVQFPNHH4TJNRYNPK2BKJ/#BEGGQEU6MG7RYIY7HB4I6VQ23L6TXB6H
Note:
In the original post, the description of how __getitem__ (etc.) method
would be got was not precise. However, I hope what I wrote makes sense
for most situations.
Best regards,
Takuo Matsuoka
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