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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 get_interfaces(self, socket_connection=None):
 """Returns the a list of Interface objects the service implements."""

        if not socket_connection:
            socket_connection = self.open_connection()
            close_socket = True
        else:
            close_socket = False

        # noinspection PyUnresolvedReferences
        _service = self.handler(self._interfaces["org.varlink.service"], socket_connection)
        self.info = _service.GetInfo()

        if close_socket:
            socket_connection.close()

        return self.info['interfaces']