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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 set_priority(self, priority):
 """ Set Screen Priority Class """


        if priority in ["hidden", "background", "info", "foreground", "alert", "input"]:
            self.priority = priority
            self.server.request("screen_set %s priority %s" % (self.ref, self.priority))