pip install [--user] speedy

easy_install speedy

class MyHandler(object):
    def foo(self, handle, arg1, arg2):
        handle.done(do_something(arg1, arg2))

import rpc.server
s = rpc.server.RPCServer('localhost', 9999, handler=MyHandler())
s.start()

import rpc.client
c = rpc.client.RPCClient('localhost', 9999)
future = c.foo('Some data', 'would go here')
assert future.wait() == 'Expected result.'