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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def open(self) -> bool: """ This property is ``True`` when the connection is usable. It may be used to detect disconnections but this is discouraged per the EAFP_ principle. When ``open`` is ``False``, using the connection raises a :exc:`~websockets.exceptions.ConnectionClosed` exception. .. _EAFP: https://docs.python.org/3/glossary.html#term-eafp """

        return self.state is State.OPEN and not self.transfer_data_task.done()