Here the ``UpperOut`` class redefines the ``write()`` method to convert the
argument string to uppercase before calling the underlying
-``self.__outfile.write()`` method. All other methods are delegated to the
-underlying ``self.__outfile`` object. The delegation is accomplished via the
+``self._outfile.write()`` method. All other methods are delegated to the
+underlying ``self._outfile`` object. The delegation is accomplished via the
``__getattr__`` method; consult :ref:`the language reference <attribute-access>`
for more information about controlling attribute access.