2797             _rev = None  variable in ClassPropertiesAndMethods.test_basic_inheritance.madtuple
2799                 if self._rev is not None:
2800                     return self._rev
2803                 self._rev = self.__class__(L)
2804                 return self._rev
2832             _rev = None  variable in ClassPropertiesAndMethods.test_basic_inheritance.madstring
2834                 if self._rev is not None:
2835                     return self._rev
2838                 self._rev = self.__class__("".join(L))
2839                 return self._rev
2896             _rev = None  variable in ClassPropertiesAndMethods.test_basic_inheritance.madunicode
2898                 if self._rev is not None:
2899                     return self._rev
2902                 self._rev = self.__class__("".join(L))
2903                 return self._rev