def test_callcapture_nofd(): 

       def func(x, y): 

           os.write(1, "hello")

           os.write(2, "hello")

           print x

           print >>py.std.sys.stderr, y

           return 42

->     res, out, err = py.io.StdCapture.call(func, 3, y=4) 

       assert res == 42 

       assert out.startswith("3") 

       assert err.startswith("4") 

   def call(cls, func, *args, **kwargs): 

       """ return a (res, out, err) tuple where

               out and err represent the output/error output

               during function execution. 

               call the given function with args/kwargs

               and capture output/error during its execution. 

           """ 

       so = cls()

       try: 

           res = func(*args, **kwargs)

       finally: 

->         out, err = so.reset()

       return res, out, err