Make sure that animations are probably cleared before rerunning by calling init both when showing and saving

Author: jenshnielsen

lib/matplotlib/animation.py

@@ -611,6 +611,7 @@ def _start(self, *args):
         # actually start the event_source. We also disconnect _start
         # from the draw_events
         self.event_source.add_callback(self._step)
+        self._init_draw()
         self.event_source.start()
         self._fig.canvas.mpl_disconnect(self._first_draw_id)
         self._first_draw_id = None  # So we can check on save
@@ -760,6 +761,9 @@ def save(self, filename, writer=None, fps=None, dpi=None, codec=None,
         # since GUI widgets are gone. Either need to remove extra code to
         # allow for this non-existant use case or find a way to make it work.
         with writer.saving(self._fig, filename, dpi):
+            for anim in all_anim:
+                # Clear the initial frame
+                anim._init_draw()
             for data in zip(*[a.new_saved_frame_seq()
                               for a in all_anim]):
                 for anim, d in zip(all_anim, data):