def test_multi_consumer(self): 

       l = []

       py.log.setconsumer("x1", l.append)

       py.log.setconsumer("x1 x2", None) 

->     p = py.log.Producer("x1 x2")

       p("hello")

       assert not l

       py.log.Producer("x1")("hello")

       assert l

       assert l[0].content() == "hello"