Merge pull request #18263 from meeseeksmachine/auto-backport-of-pr-18260-on-v3.3.x

QuLogic · web-flow · commit b1452eb542c8 · 2020-08-14T17:57:30.000-04:00
Backport PR #18260 on branch v3.3.x (Add parent widget to IntVar)
diff --git a/lib/matplotlib/backends/_backend_tk.py b/lib/matplotlib/backends/_backend_tk.py
@@ -575,7 +575,7 @@ def _Button(self, text, image_file, toggle, command):
             # other near checkbuttons
             # https://bugs.python.org/issue29402
             # https://bugs.python.org/issue25684
-            var = tk.IntVar()
+            var = tk.IntVar(master=self)
             b = tk.Checkbutton(
                 master=self, text=text, image=image, command=command,
                 indicatoron=False, variable=var)
