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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 do_work(self):
 """Run a single connection iteration. This will return `True` if the connection is still open and ready to be used for further work, or `False` if it needs to be shut down. :rtype: bool :raises: TimeoutError or ~uamqp.errors.ClientTimeout if CBS authentication timeout reached. """

        if self._shutdown:
            return False
        if not self.client_ready():
            return True
        return self._client_run()