[issue27162] Add idlelib.interface module

[Terry J. Reedy]

Terry J. Reedy added the comment:

Nick later suggested against this, and in the absence of requests, I don't want 
to do this, at least not before 3.7, if ever.  What if we make a change that 
makes the public promise awkward? The docstring for colordelegator should say 
how it is used (in IDLE and turtledemo).  Anyone else interested could follow 
the instructions, at their own risk, not mine.

--
resolution:  -> rejected
stage: needs patch -> resolved
status: open -> closed

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[issue27162] Add idlelib.interface module

[Terry J. Reedy]

Terry J. Reedy added the comment:

Import should fail if tk.TkVersion < 8.5.

--

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[issue27162] Add idlelib.interface module

[Zachary Ware]

Changes by Zachary Ware :


--
components: +IDLE -ctypes

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[issue27162] Add idlelib.interface module

[Terry J. Reedy]

New submission from Terry J. Reedy:

In msg243635 of the renaming issue #24225, Nick suggested

"One path you may want to consider is progressively factoring out a public 
"idlelib.extensions" API, and treat everything else in idlelib as fair game for 
renaming. Folks tend to be more tolerant of disruption if the new state of 
affairs is also clearly better for them, not just the folks making the change."

This issue is an implementation of that idea, except that I want to reserve 
'extension' for modules added by 3rd parties using the extension interface.  
The new module would consist of callables that make builtin IDLE features 
available to non-IDLE tkinter code.

The first callable would replace the following from turtledemo.__main__

from idlelib.colorizer import ColorDelegator, color_config
from idlelib.percolator import Percolator
...
Percolator(self.text).insertfilter(ColorDelegator())
...
color_config(text)

with

from idlelib.interface import colorize
...
colorize(text)

At the moment, interface would have the imports and 

def colorize(text):
color_config(text)
Percolator(self.text).insertfilter(ColorDelegator())

Future enhancements might be to accept a color scheme name and to return the 
Percolator instance (or a wrapper thereof), but these would not break code.  In 
any case, colorize would be re-written if the needed incantation changed, and 
turtledemo would continue to work without change.

An new public module should not be backported for the usual reasons.  New 
callables should also not be added except in comments.  I plan to only add 
features that are requested, and perhaps a very few others, rather than 
everything and everything possible.

--
assignee: terry.reedy
components: ctypes
messages: 266739
nosy: terry.reedy
priority: normal
severity: normal
stage: needs patch
status: open
title: Add idlelib.interface module
type: enhancement
versions: Python 3.6

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