picker may not be callable.

anntzer · anntzer · commit 3fde6433f693 · 2016-12-14T16:54:31.000-08:00
diff --git a/lib/matplotlib/artist.py b/lib/matplotlib/artist.py
@@ -437,7 +437,7 @@ def pick(self, mouseevent):
         # Pick self
         if self.pickable():
             picker = self.get_picker()
-            if picker is not None:
+            if callable(picker):
                 inside, prop = picker(self, mouseevent)
             else:
                 inside, prop = self.contains(mouseevent)
