def perform_execution_setup(self):
        """Clear input slots, set finished flag to False.

        Performed before and after a node execution.
        """
        ### clear the argument map and insert empty dicts
        ### for subparameters

        self.argument_map.clear()

        for param_name in self.var_kind_map:
            self.argument_map[param_name] = {}

        ### update set of ids from nodes that provide input to this one
        self.clear_source_ids()
Clear input slots, set finished flag to False.

        Performed before and after a node execution.
        
nodezator/graphman/callablenode/execution.py