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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:
 async def playstatus(self, use_revision=False, timeout=None):
 """Request raw data about what is currently playing. If use_revision=True, this command will "block" until playstatus changes on the device. Must be logged in. """

        cmd_url = _PSU_CMD.format(
            self.playstatus_revision if use_revision else 0)
        resp = await self.daap.get(cmd_url, timeout=timeout)
        self.playstatus_revision = parser.first(resp, 'cmst', 'cmsr')
        return resp