Python实现的排列组合计算操作示例
本文实例讲述了Python实现的排列组合计算操作。分享给大家供大家参考,具体如下:
1. 调用 scipy 计算排列组合的具体数值
>> from scipy.special import comb, perm
>> perm(3, 2)
6.0
>> comb(3, 2)
3.0
2. 调用 itertools 获取排列组合的全部情况数
>> from itertools import combinations, permutations
>> permutations([1, 2, 3], 2)
<itertools.permutations at 0x7febfd880fc0>
# 可迭代对象
>> list(permutations([1, 2, 3], 2))
[(1, 2), (1, 3), (2, 1), (2, 3), (3, 1), (3, 2)]
>> list(combinations([1, 2, 3], 2))
[(1, 2), (1, 3), (2, 3)]