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Re: How come StopIteration.__base__ is not BaseException?

From random832@fastmail.us
References <kvgapp$lh3$1@speranza.aioe.org>
Subject Re: How come StopIteration.__base__ is not BaseException?
Date 2013-08-26 16:10 -0400
Newsgroups comp.lang.python
Message-ID <mailman.246.1377547832.19984.python-list@python.org> (permalink)

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On Mon, Aug 26, 2013, at 15:37, Marco Buttu wrote:
> Since StopIteration is not an error, how come does it inherit directly 
> from Exception and not from BaseException?

The reason KeyboardInterrupt and SystemExit inherit from BaseException
is because you often want them to escape (allowing the program to quit)
from code that would otherwise catch them (by catching Exception). On
the contrary, StopIteration is almost always used in a context that
catches it specifically.

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How come StopIteration.__base__ is not BaseException? Marco Buttu <marco.buttu@gmail.com> - 2013-08-26 21:37 +0200
  Re: How come StopIteration.__base__ is not BaseException? random832@fastmail.us - 2013-08-26 16:10 -0400
    Re: How come StopIteration.__base__ is not BaseException? Marco Buttu <marco.buttu@gmail.com> - 2013-08-27 08:17 +0200
      Re: How come StopIteration.__base__ is not BaseException? Marco Buttu <marco.buttu@gmail.com> - 2013-08-27 08:18 +0200
      Re: How come StopIteration.__base__ is not BaseException? Steven D'Aprano <steve@pearwood.info> - 2013-08-27 09:22 +0000
        Re: How come StopIteration.__base__ is not BaseException? Marco Buttu <marco.buttu@gmail.com> - 2013-08-27 12:02 +0200
          Re: How come StopIteration.__base__ is not BaseException? Terry Reedy <tjreedy@udel.edu> - 2013-08-27 14:51 -0400
            Re: How come StopIteration.__base__ is not BaseException? Marco Buttu <marco.buttu@gmail.com> - 2013-08-27 21:52 +0200
              Re: How come StopIteration.__base__ is not BaseException? Terry Reedy <tjreedy@udel.edu> - 2013-08-27 16:37 -0400
  Re: How come StopIteration.__base__ is not BaseException? Ethan Furman <ethan@stoneleaf.us> - 2013-08-27 13:00 -0700

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