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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 push_pq(self, tokens):
 """ Creates and Load object, populates it with data, finds its Bus and adds it. """

        logger.debug("Pushing PQ data: %s" % tokens)

        bus = self.case.buses[tokens["bus_no"] - 1]
        bus.p_demand = tokens["p"]
        bus.q_demand = tokens["q"]