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From: eryk sun <eryksun@gmail.com>
Newsgroups: comp.lang.python
Subject: Re: __qualname__ exposed as a local variable: standard?
Date: Sat, 9 Jul 2016 18:52:33 +0000
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Xref: csiph.com comp.lang.python:111228

On Sat, Jul 9, 2016 at 4:08 AM,  <carlosjosepita@gmail.com> wrote:
>
> I noticed __qualname__ is exposed by locals() while defining a class.

This is an undocumented implementation detail used to pass this
information to the metaclass. You'll also see __module__ and, if the
class has a docstring, __doc__. For CPython, this is implemented in
the functions compiler_class (for __module__ and __qualname__) and
compiler_body (for __doc__), which you'll find in Python/compile.c.