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Date: Mon, 9 Jun 2014 11:56:46 -0500
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Subject: Re: try/except/finally
From: Skip Montanaro <skip@pobox.com>
To: Shiyao Ma <i@introo.me>
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Xref: csiph.com comp.lang.python:73051

On Mon, Jun 9, 2014 at 11:23 AM, Shiyao Ma <i@introo.me> wrote:
>
> It would be great if someone could discuss it from the viewpoint of bytecode. e.g., how the stack is popped, etc.

BITD, you couldn't have try/except/finally. You could have try/except
or try/finally. You could nest the two, which is what people used to
do (back when we had to walk uphill both ways to school in a
snowstorm). As I recall, it wasn't implemented from the start because
the benefit of having try/except/finally didn't outweigh the
difficulty of implementation. Someone finally buckled down and
implemented it. To understand it, I think you might have to read the
source and PEP 341.