def modify_origin(self, from_state, from_key):
        """Set both from_state and from_key at the same time to modify data flow origin

        :param str from_state: State id of the origin state
        :param int from_key: Data port id of the origin port
        :raises exceptions.ValueError: If parameters have wrong types or the new data flow is not valid
        """
        if not isinstance(from_state, string_types):
            raise ValueError("Invalid data flow origin port: from_state must be a string")
        if not isinstance(from_key, int):
            raise ValueError("Invalid data flow origin port: from_key must be of type int")

        old_from_state = self.from_state
        old_from_key = self.from_key
        self._from_state = from_state
        self._from_key = from_key

        valid, message = self._check_validity()
        if not valid:
            self._from_state = old_from_state
            self._from_key = old_from_key
            raise ValueError("The data flow origin could not be changed: {0}".format(message))
def modify_origin ( self , from_state , from_key ) : if not isinstance ( from_state , string_types ) : raise ValueError ( "Invalid data flow origin port: from_state must be a string" ) if not isinstance ( from_key , int ) : raise ValueError ( "Invalid data flow origin port: from_key must be of type int" ) old_from_state = self . from_state old_from_key = self . from_key self . _from_state = from_state self . _from_key = from_key valid , message = self . _check_validity ( ) if not valid : self . _from_state = old_from_state self . _from_key = old_from_key raise ValueError ( "The data flow origin could not be changed: {0}" . format ( message ) )
Set both from_state and from_key at the same time to modify data flow origin

        :param str from_state: State id of the origin state
        :param int from_key: Data port id of the origin port
        :raises exceptions.ValueError: If parameters have wrong types or the new data flow is not valid