Python 排列组合

import  itertools

#排列
# p1 = itertools.permutations([1,2,3,4,5],2)
# print(p1)
# print(list(p1))

# p1 = itertools.permutations([1,2,3,4,5],2)
# print(p1)
# print(list(p1))
# 
# #组合
# r1 = itertools.combinations([1,2,3,4,5],2)
# print(list(r1))
# r1 = itertools.combinations([1,2,3,4,5],2)
# print(list(r1))


#笛卡尔积
# d1 = itertools.product([1,2,3,4,5],repeat=3)
#
# """
# 1 2 3 4 5       1 2 3 4 5
#
# """
# d2 = itertools.product("qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890",repeat=2)
# print(list(d2))
# l1 = list(d2)
# l1 = [''.join(x) for x in l1]
# print(l1)