added __hash__ so that data model will be happy again

tacaswell · tacaswell · commit 908b31bc3fc4 · 2013-11-19T13:49:53.000-06:00
diff --git a/lib/matplotlib/gridspec.py b/lib/matplotlib/gridspec.py
@@ -468,3 +468,8 @@ def __eq__(self, other):
         return all((self._gridspec == other._gridspec,
                     self.num1 == other.num1,
                     self.num2 == other.num2))
+
+    def __hash__(self):
+        return (hash(self._gridspec) ^
+                hash(self.num1) ^
+                hash(self.num2))
