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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 labels(self):
 """ Provide labels without the need of dockerd. Instead skopeo is being used. :return: dict """

        if self._labels is None:
            cmd = ["skopeo", "inspect", self.skopeo_target]
            self._labels = json.loads(subprocess.check_output(cmd))["Labels"]
        return self._labels