如何将嵌套列表中的元组转换为列表？

Question

I need to find three values in a list that returns the value of zero. The problem that I have with my code is that it returns a nested list with tuples instead of lists.

Input:

[-1, 0, 1, 2, -1, -4]

Output:

[(-1, -1, 2), (-1, 0, 1)]

Expected Output:

[[-1, -1, 2], [-1, 0, 1]]

My code:

def threeSum(a):
    N = len(a)
    c=[]
    for i in range(N):
        for j in range(i+1, N):
            for k in range(j+1, N):
                if a[i]+a[j]+a[k] == 0:
                    c.append([a[i],a[j],a[k]])
    b_set = set(tuple(sorted(x)) for x in c)
    #remove duplicates
    return list(b_set)

print(threeSum([-1, 0, 1, 2, -1, -4]))

Answer 1

Insert this line

b_set = [list(x) for x in b_set]

before your return statement for your expected output
Change your return statement to just

return b_set