enum encode error:

[unisgn]

    def encode_enum(self, val, state):
        """Encode a Python Enum value into JSON."""
        eas = self.options.encode_enum_as
        if eas == 'qname':
            self.encode_string( str(obj), state )
        elif eas == 'value':
            self._do_encode( obj.value, state )
        else:  # eas == 'name'
            self.encode_string( obj.name, state )

the param name is in trouble