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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 is_connected(self):
 """ Returns the connection status of the data store. Returns: bool: ``True`` if the data store is connected to the MongoDB server. """

        if self._client is not None:
            try:
                self._client.server_info()
            except ConnectionFailure:
                return False
            return True
        else:
            return False