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From: Random832 <random832@fastmail.com>
Newsgroups: comp.lang.python
Subject: Re: Handling exceptions with Py2 and Py3
Date: Fri, 27 May 2016 09:42:59 -0400
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Xref: csiph.com comp.lang.python:109172

On Fri, May 27, 2016, at 09:18, Ben Finney wrote:
>     try:
>         short_routine()
>     except ConnectionRefusedError as exc:
>         handle_connection_refused(exc)
>     except OSError as exc:
>         if exc.errno == errno.ECONNREFUSED:
>             handle_connection_refused(exc)

But ConnectionRefusedError inherits from OSError and has errno =
ECONNREFUSED. So you can simply only have the second except block here,
and ignore the fact that Python 3 has a class hierarchy of error types.