New submission from Jose Salvatierra <j...@tecladocode.com>:
Hello!
I've encountered what might be a bug.
Up till now we had some working code that did this:
```
maps = self.style.map('TCombobox')
if maps:
self.style.map('DateEntry', **maps)
```
Modifying a custom style to mimic the map of another. This has worked fine
until Python 3.7, because the return value of `.map` is something that you can
pass to `.map` as kw and it'll process it fine.
The return value of `.map` in Python 3.7 is something like this, for the
`TCombobox`:
```
<class 'dict'>: {'focusfill': [('readonly', 'focus', 'SystemHighlight')],
'foreground': [('disabled', 'SystemGrayText'), ('readonly', 'focus',
'SystemHighlightText')], 'selectforeground': [('!focus', 'SystemWindowText')],
'selectbackground': [('!focus', 'SystemWindow')]}
```
Which is as you'd expect (and the docs say): a dictionary of properties to
lists, where each list can contain multiple tuples describing the required
state and final value of the property.
However in Python 3.8, the value returned by `.map` is this:
```
<class 'dict'>: {'focusfill': ['readonly focus', 'SystemHighlight'],
'foreground': ['disabled', 'SystemGrayText', 'readonly focus',
'SystemHighlightText'], 'selectforeground': ['!focus', 'SystemWindowText'],
'selectbackground': ['!focus', 'SystemWindow']}
```
The tuples are missing. This then causes a number of problems downstream, such
as the final property values being split into the constituent letters instead
of the values within each tuple.
----------
components: Tkinter, Windows
messages: 355818
nosy: jslvtr, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: Changes to tkinter result in (unexpected) widget map call return changes
wrt. 3.7
type: behavior
versions: Python 3.8
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38661>
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