On Wed, Oct 21, 2020 at 03:19:20AM +1100, Chris Angelico wrote:
> In every sscanf-like system I've used, there is a default value of
> some sort, either because variables are automatically initialized, or
> because the sscanf construct itself provides a default.
Then it won't go "Boom!" as you said. It will just return the default.
So your boom objection is neutralised, yay!
> You can always
> explicitly initialize them if you need to:
>
> spam = eggs = cheese = None
> f"{spam:d} {eggs:d} {cheese:d}" = "123 456"
>
> Oh look, not nearly as ugly as your strawman :)
You still have to test for None. Perhaps not as awkward as try...except,
but you still have to test each one.
Hey, it's past my bed time. I didn't think of that. But I did think of
this:
# Check whether the pattern was matched and bound to a variable.
if 'spam' in locals():
if 'eggs' in locals():
# etc
--
Steve
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