fix-tk-closedfigure-mainloop

ImportanceOfBeingErnest · ImportanceOfBeingErnest · commit b3d2b08b61fc · 2018-11-01T20:04:30.000+01:00
diff --git a/lib/matplotlib/backends/_backend_tk.py b/lib/matplotlib/backends/_backend_tk.py
@@ -1037,4 +1037,6 @@ def trigger_manager_draw(manager):
 
     @staticmethod
     def mainloop():
-        Tk.mainloop()
+        managers = Gcf.get_all_fig_managers()
+        if managers:
+            managers[0].window.mainloop()
