【笔记】python 中 set 和 itertools.china 的用法：set用来去重， {元素1，元素2，...}；itertools.chain 用来拼接多个序列

import itertools

a=[1,2,3,4,5,6,6,5]
b=['a','b','c','d','e','f','f']
print(a,b)
print(list(itertools.chain(b,a)))
aa=set(itertools.chain(b,a))
print(type(aa))
print(aa)
bb={i:j for i , j in enumerate(aa)}
print(bb)
print(set(a))

[1, 2, 3, 4, 5, 6, 6, 5] ['a', 'b', 'c', 'd', 'e', 'f', 'f']
['a', 'b', 'c', 'd', 'e', 'f', 'f', 1, 2, 3, 4, 5, 6, 6, 5]

{'e', 'c', 'd', 1, 2, 3, 4, 5, 6, 'a', 'f', 'b'}
{0: 'e', 1: 'c', 2: 'd', 3: 1, 4: 2, 5: 3, 6: 4, 7: 5, 8: 6, 9: 'a', 10: 'f', 11: 'b'}
{1, 2, 3, 4, 5, 6}

Process finished with exit code 0