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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_lease(self, new_lease):
 """ Sets a new partition lease to be processed by the pump. :param lease: The lease to set. :type lease: ~azure.eventprocessorhost.lease.Lease """

        if self.partition_context:
            self.partition_context.lease = new_lease
            self.partition_context.event_processor_context = new_lease.event_processor_context