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From: Ian Kelly <ian.g.kelly@gmail.com>
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Subject: Re: for / while else doesn't make sense
Date: Sat, 21 May 2016 07:51:34 -0600
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On Sat, May 21, 2016 at 5:26 AM, Steven D'Aprano <steve@pearwood.info> wrote:
> Does anyone know of other languages that include the same feature? It's very
> rare for Python to innovate in language features.
>
> (I wonder if it came from ABC?)

According to Raymond Hettinger starting at about 15:50 in this video:

http://pyvideo.org/video/1780/transforming-code-into-beautiful-idiomatic-pytho

It was invented by Donald Knuth (including the choice of keyword).