Kill FigureManagerTk._num.

anntzer · anntzer · commit ffe20816cfcf · 2019-09-09T12:03:50.000+02:00
The base class already defines the public .num attribute, let's just use
that like every other backend.
diff --git a/lib/matplotlib/backends/_backend_tk.py b/lib/matplotlib/backends/_backend_tk.py
@@ -432,7 +432,6 @@ def __init__(self, canvas, num, window):
         # widget is getting shrunk first (-> the canvas)
         self.toolbar = self._get_toolbar()
         self.canvas._tkcanvas.pack(side=tk.TOP, fill=tk.BOTH, expand=1)
-        self._num = num
 
         self.statusbar = None
 
@@ -471,7 +470,7 @@ def show(self):
             if not self._shown:
                 def destroy(*args):
                     self.window = None
-                    Gcf.destroy(self._num)
+                    Gcf.destroy(self.num)
                 self.canvas._tkcanvas.bind("<Destroy>", destroy)
                 self.window.deiconify()
             else:
