def validate ( self, object, name, value ):
        raise TraitError, (
              "The '%s' trait of %s instance has an unknown type. "
              "Contact the developer to correct the problem." % (
              name, class_of( object ) ) )

#-------------------------------------------------------------------------------
#  'TraitRange' class:
#-------------------------------------------------------------------------------
Verifies whether a new value assigned to a trait attribute is valid.
dataset/ETHPy150Open enthought/traits/traits/trait_handlers.py/TraitHandler.validate