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Re: try... except with unknown error types

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On Sun, Aug 21, 2011 at 7:26 PM, Paul Rubin <no.email@nospam.invalid> wrote:
> I'm not sure what to do instead.  The exceptions I'm currently dealing
> with happen when certain network operations go wrong (e.g. network or
> remote host is down, connection fails, etc.)  The remedy in each case is
> to catch the exception, log the error, and try the operation again
> later.  But there's no guaranteed-to-be-complete list in the Python docs
> of all the exceptions that can be thrown.  A new and surprising mode of
> network failure can lead to an unhandled exception, unless you catch
> everything.
>

A new and surprising mode of network failure would be indicated by a
new subclass of IOError or EnvironmentError. If you catch one of
those, you should catch it. That's the benefit of hierarchical
exceptions.

ChrisA

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try... except with unknown error types Yingjie Lin <Yingjie.Lin@mssm.edu> - 2011-08-19 15:09 -0400
  Re: try... except with unknown error types John Gordon <gordon@panix.com> - 2011-08-19 19:14 +0000
    Re: try... except with unknown error types Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-08-20 06:13 +1000
      Re: try... except with unknown error types John Gordon <gordon@panix.com> - 2011-08-19 20:24 +0000
        Re: try... except with unknown error types Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-08-20 06:45 +1000
          Re: try... except with unknown error types Seebs <usenet-nospam@seebs.net> - 2011-08-20 05:46 +0000
        Re: try... except with unknown error types John Nagle <nagle@animats.com> - 2011-08-20 13:15 -0700
      Re: try... except with unknown error types Paul Rubin <no.email@nospam.invalid> - 2011-08-20 12:18 -0700
        Re: try... except with unknown error types Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-08-21 06:14 +1000
          Re: try... except with unknown error types Paul Rubin <no.email@nospam.invalid> - 2011-08-21 11:26 -0700
            Re: try... except with unknown error types Chris Angelico <rosuav@gmail.com> - 2011-08-21 20:17 +0100
              Re: try... except with unknown error types Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-08-22 10:30 +1000
                Re: try... except with unknown error types Chris Angelico <rosuav@gmail.com> - 2011-08-22 01:41 +0100
                Re: try... except with unknown error types Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-08-22 14:01 +1000
                Re: try... except with unknown error types Paul Rubin <no.email@nospam.invalid> - 2011-08-23 00:21 -0700
                Re: try... except with unknown error types Chris Angelico <rosuav@gmail.com> - 2011-08-23 09:26 +0100
                Re: try... except with unknown error types gene heskett <gheskett@wdtv.com> - 2011-08-23 04:43 -0400
                Re: try... except with unknown error types Paul Rubin <no.email@nospam.invalid> - 2011-08-23 10:43 -0700
                Re: try... except with unknown error types Chris Angelico <rosuav@gmail.com> - 2011-08-23 10:07 +0100
                Re: try... except with unknown error types John Nagle <nagle@animats.com> - 2011-08-31 21:22 -0700
            Re: try... except with unknown error types Ethan Furman <ethan@stoneleaf.us> - 2011-08-21 12:22 -0700
            Re: try... except with unknown error types Terry Reedy <tjreedy@udel.edu> - 2011-08-21 15:52 -0400
              Re: try... except with unknown error types Chris Torek <nospam@torek.net> - 2011-08-31 21:01 +0000
                Re: try... except with unknown error types Stefan Krah <stefan-usenet@bytereef.org> - 2011-09-09 23:41 +0200
                Re: try... except with unknown error types Nobody <nobody@nowhere.com> - 2011-09-10 10:33 +0100
                Re: try... except with unknown error types Peter Otten <__peter__@web.de> - 2011-09-10 12:17 +0200
            Re: try... except with unknown error types Roy Smith <roy@panix.com> - 2011-08-21 17:14 -0400
            Re: try... except with unknown error types Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-08-22 10:25 +1000
              Re: try... except with unknown error types Roy Smith <roy@panix.com> - 2011-08-21 22:09 -0400
            Re: try... except with unknown error types Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-08-23 18:33 +1000

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