sync from Atlas repo

operator/dispatch.py

@@ -0,0 +1,17 @@
+"""
+Experiments with infix operator dispatch
+
+    >>> kadd = KnowsAdd()
+    >>> kadd + 1
+    (<KnowsAdd object>, 1)
+    >>> kadd * 1
+
+"""
+
+
+class KnowsAdd:
+    def __add__(self, other):
+        return self, other
+    def __repr__(self):
+        return '<{} object>'.format(type(self).__name__)
+