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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_jobs_url(self):
 """Get & save jobs URL from the status call."""

        if self._jobs_url is None:
            self.get_instance_status()
            if self._jobs_url is None:
                raise ValueError("Cannot obtain jobs URL")
        return self._jobs_url