[Python-Dev] Print policy for deprecated modules

Guido van Rossum guido at python.org
Mon Jul 23 00:38:48 CEST 2012

On Sun, Jul 22, 2012 at 2:06 PM, Ezio Melotti <ezio.melotti at gmail.com> wrote:
> On Sun, Jul 22, 2012 at 12:18 PM, anatoly techtonik <techtonik at gmail.com> wrote:
>> What is a print policy for deprecated modules? "new" module is
>> deprecated in 2.6, but 2.7.3 doesn't print any warnings. Is it a bug?
>>     python -Wd -c "import new"
> In theory this should show a warning, but for some reason it doesn't.
> Reading the messages on http://bugs.python.org/issue1247765 it seems
> that there wasn't a clear consensus about the deprecation schedule, so
> that might be the reason.
> If the warning is missing just because no one remembered to add it, I
> guess it can still be fixed on 2.7, but for 2.6 is too late now.
> FWIW you get a warning if you use the -3 flag:
>   $ python -Wd -3 -c "import new"
>   -c:1: DeprecationWarning: The 'new' module has been removed in
> Python 3.0; use the 'types' module instead.

IIRC we decided not to add new deprecations to 2.7, since the
deprecation would only affect the Python 3 line anyway -- nothing that
exists in Python 2 is going away in Python 2...

--Guido van Rossum (python.org/~guido)

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