Merge pull request #12307 from anntzer/property-missing-message

dstansby · web-flow · commit 1c55a25b97f6 · 2018-09-27T17:14:01.000+01:00
Clarify missing-property error message.
diff --git a/lib/matplotlib/artist.py b/lib/matplotlib/artist.py
@@ -965,7 +965,8 @@ def _update_property(self, k, v):
             else:
                 func = getattr(self, 'set_' + k, None)
                 if not callable(func):
-                    raise AttributeError('Unknown property %s' % k)
+                    raise AttributeError('{!r} object has no property {!r}'
+                                         .format(type(self).__name__, k))
                 return func(v)
 
         with cbook._setattr_cm(self, eventson=False):
