Rick Moore wrote: > I just downloaded and installed Kepler for some experimenting. I want to > use the PythonScript actor in one of the experiments, but can't figure > out where it is located in the actor pane, though I did find the demos. > Documentation of this actor appears to be non-existant as even Google > search yields no useful results. > > Any help would be greatly appreciated. > -- > > */Rick Moore /* >
Hmm... In Ptolemy II, when I do "Get Documentation" I get this... Not sure why it's not there in Kepler... Edward ------- An actor of this class executes a Python script. There are two versions of this actor provided in the Vergil libraries. The one called "PythonActor" has an input port and an output port; to view or edit its Python script, look inside the actor. The second version is called "PythonScript" and has no ports; to view or edit its Python script, select Configure (or double click on the icon). Upon creation, this actor has no ports, and no parameters other than script; The script parameter has visibility EXPERT, and therefore does not normally show up in a configure dialog for the actor. To make the script visible and editable, you have two options. Including an instance of an attribute of class TextEditorConfigureFactory (with its attributeName parameter set to script) results in behavior like that of the Vergil "PythonScript." That is, to edit the script, you Configure the actor. If instead you include an instance of TextEditorTableauFactory, then to edit the script you look inside the actor. Use the latter if you wish to add additional attributes to the actor and hide the script from the users. Use the former if the script is the main means by which users interact with the actor. Upon creation, this actor has no ports, and no parameters other than script; The script parameter has visibility EXPERT, and therefore does not normally show up in a configure dialog for the actor. To make the script visible and editable, you have two options. Including an instance of an attribute of class TextEditorConfigureFactory (with its attributeName parameter set to script) results in behavior like that of the Vergil "PythonScript." That is, to edit the script, you Configure the actor. If instead you include an instance of TextEditorTableauFactory, then to edit the script you look inside the actor. Use the latter if you wish to add additional attributes to the actor and hide the script from the users. Use the former if the script is the main means by which users interact with the actor. The functionality of an actor of this type is given by a Python script. As an example, a simplified version of the Scale actor can be implemented by the following script: 1. class Main : 2. "scale" 3. def fire(self) : 4. if not self.input.hasToken(0) : 5. return 6. s = self.scale.getToken() 7. t = self.input.get(0) 8. self.output.broadcast(s.multiply(t)) Line 1 defines a Python class Main. This name is fixed. An instance of this class is created when the actor is initialized. Line 2 is a description of the purpose of the script. Lines 3-8 define the fire() method, which is called by the fire() method of this actor. In the method body, input and output are ports that have to have been added to the actor, and scale is a parameter that has to have been added to the actor (these can be added in the XML that defines the actor instance in an actor library). The Main class can provide other methods in the Executable interface as needed. In the script, use self.actor to access the actor. For example, self.actor.getDirector() returns the current director of the actor. For debugging, use self.actor.debug(someMessage). The final message sent to the debug listeners of the actor will have the string "From script: " inserted at the beginning. To avoid generating the debug message when there are no listeners, use: if self.actor.isDebugging() : self.actor.debug(someMessage) This class relies on Jython, which is a Java implementation of Python. As of 1/2/2006, $PTII/lib/jython.jar was based on Jython 1.1 . The Jython Registry - information about how to set the search path. Follow the links below for more information about the Python language, licensing, downloads, etc. -------------- next part -------------- A non-text attachment was scrubbed... Name: eal.vcf Type: text/x-vcard Size: 351 bytes Desc: not available URL: <http://mercury.nceas.ucsb.edu/kepler/pipermail/kepler-users/attachments/20081204/fecec53b/attachment.vcf>
