You should post these kind of questions to the jython users list. This is the 
developer list. Since I've already answered them though, I'll post the reply 
here (just this time).

"Colbert Philippe" wrote:
> - Can we implement interface directly in Jython?  If yes, how (example)?

You can't create an interface in Jython that you use as an interface when 
defining a class in Java, if that answers your question. You can however 
create pythonic interfaces in Jython (and use them like base classes in Java).

class ActionListener:
   def actionPerformed(e):
      raise NotImplementedError

> - Can we embed a Jython script in a way that the script can be called several 
> times and keep its environment?

Why not just save state between invocations to disk? If your state data is 
complicated the task can be simplified by using the pickle module.

<code> 
import pickle

class NotSoComplicatedState:
   def __init__(self):
      self.invocations = 0

try:
   counter = pickle.load(open('my.state'))
except IOError:
   counter = NotSoComplicatedState()

counter.invocations += 1
print 'script called for the %i:th time' % counter.invocations

pickle.dump(counter, open('my.state', 'w'))
</code> 


...johahn


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