On 4/28/2011 11:22 AM, s...@pobox.com wrote:

     Barry>  I would agree.  Use asserts for "this can't possibly happen
     Barry>  <wink>" conditions.

Without looking, I suspect that's probably what the author thought he was
doing.

You wish: to repeat the example from threading:

   def __init__(self, group=None, target=None, name=None,
                 args=(), kwargs=None, verbose=None):
        assert group is None, "group argument must be None for now"

is something that can easily happen.

--
Terry Jan Reedy

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