[Python-Dev] Please reconsider PEP 479.

[Chris Angelico]

On Thu, Nov 27, 2014 at 11:50 AM, Guido van Rossum <guido at python.org> wrote:
> No, that was a figure of speech. The proposed decorator returns a new
> function object that references a new code object. The original function and
> code object are unchanged.

Then it has a potentially-confusing interaction with decorators like
Flask's app.route(), which return the original function unchanged, but
also save a reference to it elsewhere. The order of decoration
determines the effect of the @hettinger decorator; there will be two
functions around which are almost, but not entirely, identical, and
it'd be very easy to not notice that you decorated in the wrong order.

ChrisA