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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 sync_policies(self, vault_client):
 """Synchronizes policies only"""

        p_resources = [x for x in self.resources()
                       if isinstance(x, Policy)]
        for resource in p_resources:
            resource.sync(vault_client)

        return [x for x in self.resources()
                if not isinstance(x, Policy)]