Calling dir() on a Structure includes Suitcase fields

Author: rtzoeller

suitcase/structure.py

@@ -293,6 +293,9 @@ def __setattr__(self, key, value):
             return field.setval(value)
         return object.__setattr__(self, key, value)
 
+    def __dir__(self):
+        return object.__dir__(self) + [str(k) for k, v in self._sorted_fields]
+
     def __iter__(self):
         return iter(self._sorted_fields)