On Sun, Jan 6, 2019 at 9:40 AM Paul G <[email protected]> wrote: > I am not familiar enough with the compiler logic, but would it be possible > to optimize this away by detecting whether the bound name has already been > deleted during the body of the except statement? >
As was said before, it's not useful to optimize code that only runs on an exception. (Though if there was a On January 6, 2019 4:18:00 PM UTC, Chris Angelico <[email protected]> wrote: > > On Mon, Jan 7, 2019 at 3:13 AM Paul G <[email protected]> wrote: > >> >> I think Serhiy is saying that if you delete exc before the except body >> ends, when the compiled code goes to delete it it will fail. Binding to None >> guarantees that there is something to delete. >> > > Ahh! Thank you. I interpreted that example as a "this is what it > compiles to", rather than actual source code that might fail. Can we > get this example, suitably annotated, into the documentation > somewhere? > > I don't see a reason to document this behavior -- it would be strange if it *didn't* work. If we had an opcode to delete a variable but didn't raise if it is unset, we could use that, but otherwise I see no action needed here. -- --Guido van Rossum (python.org/~guido)
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