Hi Rick, I'm not familiar with Python or Python tuples. http://diveintopython.org/getting_to_know_python/tuples.html says "A tuple is an immutable list. A tuple can not be changed in any way once it is created."
You could try setting the type of the port to object, but this might require hacking around with the Python actor code. It could be that there is a need for a PythonTuple type, which is not that difficult to add if there is no need to convert from other types to PythonTuple. --start-- 5.3 How do I add a type? The Ptolemy Type system is covered in a chapter in "Volume 2: Ptolemy II Software Architecture," which can be found via http://ptolemy.eecs.berkeley.edu/ptolemyII/designdoc.htm The Ptolemy Type system has a type lattice that is implemented in classes in ptolemy.data.type. A common misconception is that to add a type, one needs to add the new type to the type lattice by editing ptolemy.data.type.BaseType. However, you need only add a type to the type lattice if you want to automatically convert your type to preexisting types (other than UNKNOWN and GENERAL). If you have a type class, then the type system will check types for you. For examples, see $PTII/ptolemy/data/type/test/TestToken.java and $PTII/ptolemy/actor/lib/Security/KeyToken.java. --end-- The advantage of adding a PythonTupleToken over using an ObjectToken is that with a PythonTupleToken, you can be sure that two actors are sharing the right data type instead of just a random Object. _Christopher Rick Moore wrote: > I'm trying to use multiple Python Actors in a data validation workflow. > What I need to do is pass a Python tuple from one Python Actor to the > next, but I can't figure out how to configure the ports to allow it. So > far have tried setting the type to General and Unknown and also leaving > the type blank. > > I'm new at this, so any help would be greatly appreciated. > > Rick Moore > Information Science > Cornell University > _______________________________________________ > Kepler-users mailing list > Kepler-users at kepler-project.org > http://mercury.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-users -- Christopher Brooks (cxh at eecs berkeley edu) University of California CHESS Executive Director US Mail: 337 Cory Hall Programmer/Analyst CHESS/Ptolemy/Trust Berkeley, CA 94720-1774 ph: 510.643.9841 fax:510.642.2718 (Office: 545Q Cory) home: (F-Tu) 707.665.0131 (W-F) 510.655.5480