Improve dir( GithubObject )

github/GithubObject.UnitTest.py

@@ -38,6 +38,8 @@ class GithubObjectWithOnlySimpleScalarAttributes( TestCaseWithGithubTestObject )
         SimpleScalarAttributes( "a1", "a2", "a3", "a4" )
     )
 
+    def testInterface( self ):
+        self.assertEqual( [ e for e in dir( self.o ) if not e.startswith( "_" ) ], [ "a1", "a2", "a3", "a4"  ] )
 
     def testCompletion( self ):
         # A GithubObject:

github/GithubObject.py

@@ -135,6 +135,9 @@ def GithubObject( className, *attributePolicies ):
                 else:
                     self.__attributes[ attributeName ] = attributeDefinition.getValueFromRawValue( self, attributeValue )
 
+        def __dir__( self ):
+            return attributeDefinitions.keys()
+
         def __fetchAttribute( self, attributeName ):
             attributeDefinition = attributeDefinitions[ attributeName ]
             attributeDefinition.updateAttributes( self )