How to make a set of lists
Solution 1:
You can create a set of tuples, a set of lists will not be possible because of non hashable elements as you mentioned.
>>> l = [[1, 2, 3], [2, 4, 5], [1, 2, 3], [2, 4, 5]]
>>> set(tuple(i) for i in l)
{(1, 2, 3), (2, 4, 5)}
Solution 2:
i = [[1, 2, 3], [2, 4, 5], [1, 2, 3], [2, 4, 5]]
print([ele for ind, ele in enumerate(i) if ele not in i[:ind]])
[[1, 2, 3], [2, 4, 5]]
If you consider [2, 4, 5]
to be equal to [2, 5, 4]
then you will need to do further checks
Solution 3:
You can convert each element to a tuple and then insert it in a set.
Here's some code with your example:
tmp = set()
a = [[1, 2, 3], [2, 4, 5], [1, 2, 3], [2, 4, 5]]
for i in a:
tmp.add(tuple(i))
tmp
will be like this:
{(1, 2, 3), (2, 4, 5)}
Solution 4:
Here's another way to do it:
I = [[1, 2, 3], [2, 4, 5], [1, 2, 3], [2, 4, 5]]
mySet = set()
for j in range(len(I)):
mySet = mySet | set([tuple(I[j])])
print(mySet)