python之排列组合测试

#  test permutations and combinations 

import itertools as it

for i in it.combinations('abcd',2):

    print (i)

for j in it.combinations('123456',4):

    print (j)

for k in it.permutations('ABCDEF',2):

    print (k)

for m in it.product('ZXY','1234'):

    print (m)

lists = ['a','b','c']

print (list(itertools.permutations(lists,2)))#排列，和顺序有关

print ('='*60)

print (list(itertools.combinations(lists,2)))#组合，和顺序无关