Add __str__ for None

ncw · ncw · commit 1455b43f3e28 · 2014-11-19T08:29:37.000Z
diff --git a/py/none.go b/py/none.go
@@ -19,5 +19,10 @@ func (a NoneType) M__bool__() Object {
 	return False
 }
 
+func (a NoneType) M__str__() Object {
+	return String("None")
+}
+
 // Check interface is satisfied
 var _ I__bool__ = None
+var _ I__str__ = None
