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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Thu, 22 Dec 2011 18:27:54 -0700
Subject: Re: Grammar for classes
To: Terry Reedy <tjreedy@udel.edu>
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On Thu, Dec 22, 2011 at 4:39 PM, Terry Reedy <tjreedy@udel.edu> wrote:
> Beats me. The 2.7 doc says inheritance ::=3D =A0"(" [expression_list] ")"=
 and I
> no on no 3.x change/addition.

Well, there is one change in 3.x which is that the inheritance list
now accepts keyword parameters (PEP 3115) -- the "metaclass" keyword
specifies the metaclass instead of using a bogus __metaclass__
attribute, and any other keywords are passed along to the metaclass.
That's why the parsing of the inheritance list was generalized to look
more like a function call, but it doesn't explain why the class
declaration might wish to receive a comprehension.

Cheers,
Ian