On 2016-10-29 10:34, Eli Zaretskii wrote:
>> From: Clément Pit--Claudel <clement.pit@gmail.com>
>> Date: Sat, 29 Oct 2016 10:12:54 -0400
>>
>> If no one objects, I'll push the attached patch to master tomorrow (or should it go to emacs-25?)
> 
> Can you tell when was the problem introduced?

The problem is new in Emacs 25: native completion is a new feature of python mode (2cb7592275bce47e44916134223b994a75e4b861).

Clément.