[Python-Dev] Rewriting PEP4

["Martin v. Löwis"]

Raymond Hettinger wrote:
> One other thought:  In deciding how long to leave module in, we should
> consider that Python books are updated infrequently, if at all.  It
> would be a bummer if code in them stopped working as advertised.

Correct. Thanks for reminding me - that is indeed a reasoning that
is typically brought up by book authors, so I should have brought
it up myself :-)

Of course, developers would first see the deprecation warning,
which would tell them that their books are outdated. However, if
the code is removed, they get an import error, which leaves them
guessing what the problem might have been.

Regards,
Martin