gh-43457: Tkinter: fix design flaws in wm_attributes() (GH-111404)

* When called with a single argument to get a value, it allow to omit
  the minus prefix.
* It can be called with keyword arguments to set attributes.
* w.wm_attributes(return_python_dict=True) returns a dict instead of 
  a tuple (it will be the default in future).
* Setting wantobjects to 0 no longer affects the result.

1 files changed, 9 insertions, 0 deletions

diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst
index 77f4fce..c25d413 100644
--- a/Doc/whatsnew/3.13.rst
+++ b/Doc/whatsnew/3.13.rst
@@ -421,6 +421,15 @@ tkinter
   :meth:`!tk_busy_current`, and :meth:`!tk_busy_status`.
   (Contributed by Miguel, klappnase and Serhiy Storchaka in :gh:`72684`.)
 
+* The :mod:`tkinter` widget method :meth:`!wm_attributes` now accepts
+  the attribute name without the minus prefix to get window attributes,
+  e.g. ``w.wm_attributes('alpha')`` and allows to specify attributes and
+  values to set as keyword arguments, e.g. ``w.wm_attributes(alpha=0.5)``.
+  Add new optional keyword-only parameter *return_python_dict*: calling
+  ``w.wm_attributes(return_python_dict=True)`` returns the attributes as
+  a dict instead of a tuple.
+  (Contributed by Serhiy Storchaka in :gh:`43457`.)
+
 * Add support of the "vsapi" element type in
   the :meth:`~tkinter.ttk.Style.element_create` method of
   :class:`tkinter.ttk.Style`.