[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:


New changeset 383a3bec74f0bf0c1b1bef9e0048db389c618452 by Serhiy Storchaka in 
branch 'main':
bpo-46996: IDLE: Drop workarounds for old Tk versions (GH-31962)
https://github.com/python/cpython/commit/383a3bec74f0bf0c1b1bef9e0048db389c618452


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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Ronald Oussoren]

Ronald Oussoren  added the comment:

Terry: tkinter on macOS already effectively does not support Tk 8.5, or 
basically anything bug the latest 8.6.x release. That's because older versions 
have too many bugs that affect Python users, which mostly show up on our 
tracker as bug reports about IDLE.

Because of this we generally close issues that mention using tkinter with 8.5 
on macOS unless the problem can be reproduced using 8.6 as well (using the 
installer on python.org).

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Christian Heimes]

Change by Christian Heimes :


--
nosy:  -christian.heimes

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Terry J. Reedy]

Terry J. Reedy  added the comment:

tk release availability is a bit confusing.
  https://wiki.tcl-lang.org/page/Changes+in+Tcl%2FTk+8%2E6
appears to lists things 'new' in 3.6.1, but that seems to mean new since 8.5.1, 
as it includes thing introduced in 8.5.n, where n > 1. For instance, ttk 
spinbox is listed in this doc, but was available in 8.5.9, so is in 8.5.12+ and 
can be used without an 8.6 requirement.

Similarly,
  https://www.tcl.tk/man/tcl8.5/TkCmd/ttk_treeview.html
the 8.5.19 doc for the widget, shows the 'new in 8.6' treeview tag commands.  I 
suspect that they were present in 8.5.13.  Is there a specific 8.5.12 doc 
available?  I searched and tried adding '.12' in the url above and both failed. 
 Buildbots without _tkinter don't help either.

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status: open -> closed

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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status: closed -> open

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
pull_requests: +30051
pull_request: https://github.com/python/cpython/pull/31962

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

After PR 31839 has been merged you cannot build the _tkinter module with Tcl/Tk 
older than 8.5.12. If you will still try to run IDLE on such incomplete build, 
an import error during importing tkinter will be translated to IDLE error:

$ ./python -m idlelib
** IDLE can't import Tkinter.
Your Python may not be configured for Tk. **

IDLE might someday require 8.6 if it start using some 8.6 features 
non-optionally.

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Terry J. Reedy]

Terry J. Reedy  added the comment:

Ronald: According to a page (which I cannot find, E. Paine should know) Centos 
7 has the oldest tcl among current *nix distributions.  
https://centos.pkgs.org/7/centos-x86_64/tcl-8.5.13-8.el7.x86_64.rpm.html
says it is 8.5.13, which is what I remember from the comparison page.

Serhiy: IDLE has required TkVersion >= 8.5 for some years (currently top of 
pyshell.py).  Does the _tkinter.c line
  #error "Tk older than 8.5.12 not supported"
translate into an ImportError (which is already caught).  I never worried about 
someone trying to import 8.3 or before, but Apple's 8.5.9 is possible.

Is there any reason that IDLE might someday require 8.6 before tkinter does?

--
nosy: +terry.reedy

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:


New changeset c2e3c06139e9468efb32629d147d99a1672d9e19 by Serhiy Storchaka in 
branch 'main':
bpo-46996: Remove support of Tcl/Tk < 8.5.12 (GH-31839)
https://github.com/python/cpython/commit/c2e3c06139e9468efb32629d147d99a1672d9e19


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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

8.5.12 will be 10 years old at the time of releasing 3.11.

We can relax the requirements for 8.5.x, so the code can be build with older 
versions, but some tests will fail because we removed workarounds for 
differences in behavior in older versions from tests.

The LTS distributions can also provide their own patches which relax the 
requirements.

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Ronald Oussoren]

Ronald Oussoren  added the comment:

One consideration is support for older LTS distributions of Linux, RHEL/Centos 
7 appears to ship with Tcl/Tk 8.5. 

The system install of Tcl/Tk on macOS is also 8.5, but that variant has too 
many bugs to try to support it.

--
nosy: +ronaldoussoren

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
components: +Tkinter
nosy: +christian.heimes, epaine, erlendaasland

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
keywords: +patch
pull_requests: +29938
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/31839

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[issue46996] Drop support of Tcl/Tk older than 8.5.12

[Serhiy Storchaka]

New submission from Serhiy Storchaka :

In issue45979 E. Paine suggested to drop support of Tcl/Tk older than 8.5.12 
(8.5.12 was released on 2012-07-27 and 8.6.0 on 2012-12-20). Tkinter tests 
contain workarounds and special cases for older versions of Tcl/Tk, many of 
them can be removed. Also some Python and C code of tkinter can be simplified.

--
components: Library (Lib), Tests
messages: 414999
nosy: serhiy.storchaka
priority: normal
severity: normal
status: open
title: Drop support of Tcl/Tk older than 8.5.12
type: enhancement
versions: Python 3.11

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