On Fri, Feb 21, 2014 at 8:41 PM, Greg Ewing <greg.ew...@canterbury.ac.nz>wrote:
> Ethan Furman wrote: > >> On 02/21/2014 03:29 PM, Greg Ewing wrote: >> >> value = lst[2] except "No value" if IndexError >>> >> >> It does read nicely, and is fine for the single, non-nested, case (which >> is probably the vast majority), but how would it handle nested exceptions? >> > > Hmmm, probably not very well, unless we define > > a except b if E1 except c if E2 > > to mean > > a except (b except c if E2) if E1 > > If E1 == E2, that could perhaps be abbreviated to > > a except b except c if E > > Or we could just decide that the nested case is going > to be so rare it's not worth worrying about. +1 on not caring. Keep the expression for simple, obvious cases of a single exception type and fall back to the statement for fancier use (just like listcomps). The focus should be ease of expressiveness for a common pattern, not trying to convert tons of try/except statements into an expression just because we can.
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