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Mon Sep 19 20:12:42 CEST 2005 · https://mail.python.org/pipermail/python-dev/2005-September/056494.html

> The only practical reason to like this feature is sparing the need of
> finding an otherwise useless name for the formal argument.  Another
> reason, but not practical at all, is that the concept conveys some
> elegance and originality (each programming language should ideally have
> a few of these) and is enforced in other places in Python, like in the
> `for' statement -- where I find implied unpacking very, very useful.

One other reason: It is possible to imagine using the feature to catch some
type errors at the point of call, rather than having to get into the
function itself before detecting them.

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[Python-Dev] removing nested tuple function parameters