[Python-Dev] Why not using "except: (...) raise" to cleanup on error?
Chris Angelico
rosuav at gmail.com
Mon Jun 4 13:11:53 EDT 2018
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Mon Jun 4 13:11:53 EDT 2018
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On Tue, Jun 5, 2018 at 2:57 AM, Yury Selivanov <yselivanov.ml at gmail.com> wrote: > On Mon, Jun 4, 2018 at 12:50 PM Chris Angelico <rosuav at gmail.com> wrote: >> >> On Tue, Jun 5, 2018 at 2:11 AM, Victor Stinner <vstinner at redhat.com> wrote: > [..] >> > For me, it's fine to catch any exception using "except:" if the block >> > contains "raise", typical pattern to cleanup a resource in case of >> > error. Otherwise, there is a risk of leaking open file or not flushing >> > data on disk, for example. >> >> Pardon the dumb question, but why is try/finally unsuitable? > > Because try..finally isn't equivalent to try..except? Perhaps you > should look at the actual code: > https://github.com/python/cpython/blob/b609e687a076d77bdd687f5e4def85e29a044bfc/Lib/asyncio/base_events.py#L1117-L1123 Oh. Duh. Yep, it was a dumb question. Sorry! The transport should ONLY be closed on error. ChrisA
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