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"JP" == Jean-Paul Calderone <exarkun@divmod.com> writes: JP> On Thu, 15 Jun 2006 17:09:26 +0200, Terry Jones <terry@jon.es> wrote:

JP> One problem with the code attached is that it creates a plugin class JP> which implements plugin.IMaterial but then goes and searches for JP> plugins which provide __main__.IMaterial. Since these aren't the same JP> interface, even without the pickle error no results will be found. OK, thanks for the tip. I've fixed things - see next mail.

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BTW, the code on that page in the section Extending an Existing Program is missing a 'from zope.interface import implements'. Also, the assumption that code is in a file called imatsim.py, and the curious 'from matsim import imatsim' could be explained. I guess the later is just a harmless anachronism?

JP> I've created a ticket in the tracker for expanding the howto to explain JP> these things. Thanks for pointing out that they were not well JP> explained. Thanks. I should have created the ticket myself. I just added another, but now see it was a duplicate. Terry