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I'm about to use KLayouts netlist data structures to go wild with it. Sofar I read structural verilog (which comes from the synthesizer) into my own netlist data structure but now I'd like to use KLayout netlists to make things more interoperable in future. However, I could not yet figure out how I can store the direction of a pin. This information would be helpful at latest for the routing. Do you see an easy way to associate I/O direction or other data with circuits and pins? (For now I think I will just use Python dictionaries that map pins to custom attributes.)