New submission from Serhiy Storchaka:
Currently Tkinter supports two modes:
* When wantobjects=1 (default), all results of Tcl/Tk commands are converted to
appropriate Python objects (int, float, str, bytes, tuple) if it is possible or
to Tcl_Obj for unknown Tcl types.
* When wantobjects=0 (legacy mode), all results of Tcl/Tk commands are
converted to strings.
But arguments of a callback are always converted to str, even when
wantobjects=1. This can lost information ("42" is not distinguished from 42 or
(42,)) and may be less efficient. Unfortunately we can't just change Tkinter to
pass callback arguments as Python objects, this is backward incompatible
change. Proposed patch introduces third mode wantobjects=2. It is the same as
wantobjects=1, but callbacks now received . Default mode is still
wantobjects=1, it can be changed in future. But in Tkinter applications (IDLE,
Turtledemo, Pynche) we can use wantobjects=2 right now.
The only problem left is documenting it. The wantobjects parameter is not
documented at all except an entry in "What's New in Python 2.3". Does anyone
want to document this feature?
----------
components: Tkinter
files: tkinter_obj_cmd.patch
keywords: patch
messages: 225446
nosy: gpolo, serhiy.storchaka, terry.reedy
priority: normal
severity: normal
stage: patch review
status: open
title: Tkinter: Don't stringify callbacks arguments
type: enhancement
versions: Python 3.5
Added file: http://bugs.python.org/file36393/tkinter_obj_cmd.patch
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