<p>i m trying to design a mmo game using python...</p>

<p>I have evaluated stackless and since it is not the general python and it is a fork, i dont want to use it</p>

<p>I am trying to chose between
pysage
candygram
dramatis
and
parley</p>

<p>any one try any of these libraries?</p>

<p>Thanks a lot for your responses</p>

I would go for
pysage
.
It has the highest level of abstraction and a lightweight messaging API which will give you lots of flexibility.   I would imagine when designing an MMO you will want as much flexibility as possible.
It also takes a page from Erlang's Actor model which is really solid.
That's great you are trying to build an MMO via python!  It has great OpenGL bindings when you want to add graphics which is great!
Hope that helps.