Try to test green threads in circuits. Fail!

circuits_test.py

from datetime import datetime
from circuits import Component, Event

class Computation(Event):
    """Computation Event"""

class Spawner(Component):
    def __init__(self, *args, **kwargs):
        super(Spawner, self).__init__()
        self.bob = Spawn(*args, **kwargs).register(self)

class Spawn(Component):
    def __init__(self, sname, function, *args, **kwargs):
        super(Spawn, self).__init__()
        self.sname = sname
        self.function = function
        self._result = None
        self._args = args
        self._kwargs = kwargs
        print("I'm i %s", self.sname)
    def started(self, *args):
        print("I'm s b %s", self.sname)
        self.fire(Computation())
        print("I'm s e %s", self.sname)
    def computation(self, *args):
        print("I'm c b %s self._result = %s", self.sname, self._result)
        self._result = self.function(*self._args, **self._kwargs)
        print("I'm c e %s self._result = %s", self.sname, self._result)
        #self.stop()
    def result():
        return self._result

def xxxpow():
    print("xxxpow start")
    time.sleep(4)
    print("xxxpow end")
    return 1

s1 = Spawner(1, xxxpow)
s2 = Spawner(2, xxxpow)

t1 = datetime.now()
(s1 + s2).run()
t2 = datetime.now()
d = t2 - t1
d.microseconds