try..except with empty exceptions
cs at zip.com.au
Sat Apr 11 23:37:34 CEST 2015
On 11Apr2015 21:21, Chris Angelico <rosuav at gmail.com> wrote:
>But I agree, it would be very nice if Python 3 could have abolished
>the truly confusing part of this, where "except:" catches everything.
>Forcing people to spell it "except BaseException:" would fix all of
>this. How hard is it to deprecate and then remove that, same as string
>exceptions were removed?
I guess I'll go over there to oppose it then.
Why? It makes it harder to write portable python 2/3 code and does not add any
Unless there's a common root exception class in Python 2, which I believe there
isn't, you can't catch all exceptions in python 2 without the "except:" syntax.
Which means the _only_ way to have some code in both 2 and 3 that does it
requires 2 codebases.
As one who tries to have his code run in both 2 (usually recent 2, like
2.6/2.7) and 3, this change would cause a signification breakage for me without
bringing any semantic benefits.
Without vigorous use of the time machine I don't see a fix here.
For the record, I would be ok (but not "for") never having had bare "except" if
all exceptions had always had a common root.
Hmm. Can I catch "object"? Sounds awful, but might work.
Cameron Simpson <cs at zip.com.au>
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