I'm trying to understand the Perspective Broker, reading over the on-site documentation, specifically the article:
http://twistedmatrix.com/projects/core/documentation/howto/pb-usage.html and there is a section about the callRemote() function that I really don't understand :) First, consider these three lines: d = factory.getRootObject() d.addCallback(lambda object: object.callRemote("echo", "hello network")) d.addCallback(lambda echo: 'server echoed: '+echo) Second, the documentation says, "...object.callRemote() returns a Deferred. Assuming the remote method was run without causing an exception (including an attempt to invoke an unknown method), the callback attached to that Deferred will be invoked with any objects that were returned by the remote method call." If I read this correctly, callRemote() returns a whole new Deferred object, which is *not* the same as the 'd' Deferred object we already have. So that *new* Deferred should be the one that the next callback (line 3) is added to, since the next callback is based on the success of the callRemote(). So wouldn't these be the correct lines: d = factory.getRootObject() d2 = d.addCallback(lambda object: object.callRemote("echo", "hello network")) d2.addCallback(lambda echo: 'server echoed: '+echo) Thanks in advance for any clarification. John C> _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
