Postmodern Error Handling in Python 3.6

Re:Postmodern Error Handling in Python 3.6 by greglindahl on Saturday February 25, 2017 @02:26PM (#13733283)

I am working on a crawler that uses async/await, and from experimentation the list is:

except (aiohttp.ClientError, aiohttp.DisconnectedError, aiohttp.HttpProcessingError, aiodns.error.DNSError, asyncio.TimeoutError, RuntimeError) as e:

I want to continue running no matter what, so I also have an "except Exception", but I have better logging now that I know what the known vs. unknown exceptions are.

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Re:Postmodern Error Handling in Python 3.6 by kstrauser on Saturday February 25, 2017 @03:17PM (#13733599)

My pattern on this stuff is to initially write:

  try:
      do_something()
  except ExpectedException:
      handle_it()
  except OtherKnownException:
      handle_that_too()
  except Exception as exc:
      log.exception('New kind of error just happened')
      handle_fallback()

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Re:Postmodern Error Handling in Python 3.6 by greglindahl on Saturday February 25, 2017 @04:32PM (#13733960)

Yes, that's basically what I'm doing.

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