On Tue, Jun 26, 2018 at 5:37 AM, Terry Reedy <[email protected]> wrote: > How loop variables might be isolated without a nested scope: After a > comprehension is parsed, so that names become strings, rename the loop > variables to something otherwise illegal. For instance, i could become > '<i>', just as lambda becomes '<lambda>' as the name of the resulting > function. Expand the comprehension as in Python 2, except for deleting the > loop names along with the temporary result name. > > Assignment expressions within a comprehension would become assignment > expressions within the for loop expansion and would automatically add or > replace values in the namespace containing the comprehension. In other > words, I am suggesting that if we want name expressions in comprehensions to > act as they would in Python 2, then we should consider reverting to an > altered version of the Python 2 expansion.
So..... sublocal scopes, like in the earliest versions of PEP 572? The wheel turns round and round, and the same spokes come up. ChrisA _______________________________________________ Python-Dev mailing list [email protected] https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com