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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 nonFinalisedReqs(self, reqKeys: List[Tuple[str, int]]):
 """ Check if there are any requests which are not finalised, i.e for which there are not enough PROPAGATEs """

        return {key for key in reqKeys if not self.requests.is_finalised(key)}