143     if scheme :

   143     if scheme :

   144         return "{scheme}://{host}:{port}".format(scheme=scheme, host=host, port=port)

   144         return "{scheme}://{host}:{port}".format(scheme=scheme, host=host, port=port)

   145     else :

   145     else :

   146         return "{host}:{port}".format(host=host, port=port)

   146         return "{host}:{port}".format(host=host, port=port)

   147 

   147 

   148 def nonblocking (call, *args, **kwargs) :

   149 def nonblocking (call, *args, **kwargs) :

   149     """

   150     """

   150         Call the given function, which read/writes on a nonblocking file, and return None if it would have blocked.

   151         Call the given function, which read/writes on a nonblocking file, and return None if it would have blocked.

   151     """

   152     """

   152 

   153