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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 get_processors(self):
        "Read the default class processors if none have been set."
        procs_x,procs_y = listify(self.train.x._processor),listify(self.train.y._processor)
        xp = ifnone(self.train.x.processor, [p(ds=self.train.x) for p in procs_x])
        yp = ifnone(self.train.y.processor, [p(ds=self.train.y) for p in procs_y])
        return xp,yp