Optimization, Operations Research, Python, Programming, Data Science.
job. class JobSequence(list): def prev(self, x): if self.is_first(x): return None else: i = self.index(x) return self[i - 1] def next(self, x): if self.is_last(x): return None else: i = self.index(x) return self[i + 1] def is_first(self, x): return x == self[0] def is_last(self, x): return x ==