python 关于列表元素拆分重新组合问题

Question

假设已知 list =[(1,2,3,4),(2,3,4,5),(3,4,5,6)]
如何对列表中的每个()里面的进行拆解成两两或者三三或者NN个组合，形成一个新的列表并去重？
期望拆分结果如下：
拆分为两个时:
result = [(1, 2), (1, 3), (1, 4), (2, 3), (2, 4), (3, 4),(2, 5),(3, 5),(4, 5),(3, 6),(4, 6),(5, 6)]
拆分为三个时：
result = [(1, 2, 3),(1, 2, 4),(1, 3, 4),(2, 3, 4),(2, 3, 5),(2, 4, 5),(3, 4, 5),(3, 4, 6),(3, 5, 6),(4, 5, 6)]

谢谢~

Answer 1

import itertools as it

li =[(1,2,3,4),(2,3,4,5),(3,4,5,6)]
res = set()

for i in li:
    x = it.combinations(i, 3)    
    res |= set(x)               
print(res)