TypeError: unhashable type: 'list' when using built-in set function

Question

I have a list containing multiple lists as its elements

eg: [[1,2,3,4],[4,5,6,7]]

If I use the built in set function to remove duplicates f

Answer 1

Definitely not the ideal solution, but it's easier for me to understand if I convert the list into tuples and then sort it.

mylist = [[1,2,3,4],[4,5,6,7]]
mylist2 = []
for thing in mylist:
    thing = tuple(thing)
    mylist2.append(thing)
set(mylist2)