#itertools.permutations()为可替代对象生成列表>>>importitertools>>>forpinitertools.permutations('ABCD'):...print(p)('A','B','C','D')('A','B','D','C')('A','C','B','D')('A','C','D','B')('A','D','B','C')('A','D','C','B')('B','A','C','D')('B','A','D','C')('B','C','A','D')('B','C','D','A')('B','D','A','C')('B','D','C','A')('C','A','B','D')('C','A','D','B')('C','B','A','D')('C','B','D','A')('C','D','A','B')('C','D','B','A')('D','A','B','C')('D','A','C','B')('D','B','A','C')('D','B','C','A')('D','C','A','B')('D','C','B','A')
