利用python itertools对列表实现排列组合

import itertools


lst = [112, 123, 98, 132, 120]

list(itertools.permutations(lst,2))

# 输出：
# [(112, 123),
#  (112, 98),
#  (112, 132),
#  (112, 120),
#  (123, 112),
#  (123, 98),
#  (123, 132),
#  (123, 120),
#  (98, 112),
#  (98, 123),
#  (98, 132),
#  (98, 120),
#  (132, 112),
#  (132, 123),
#  (132, 98),
#  (132, 120),
#  (120, 112),
#  (120, 123),
#  (120, 98),
#  (120, 132)]

list(itertools.combinations(lst, 2))

# 输出：
# [(112, 123),
#  (112, 98),
#  (112, 132),
#  (112, 120),
#  (123, 98),
#  (123, 132),
#  (123, 120),
#  (98, 132),
#  (98, 120),
#  (132, 120)]