I have a custom setitem() function.

class Myclass:
    array = [[[1]*3]]
    def __setitem__(self, idcs: tuple, other):       
        # do something
        array[idcs] = other
        return 2

I would like to do something like this:

x = Myclass()
other = [1, 2, 3]
z = x.__setitem__([0:1, 0:1, 0:], other) # change the given range of x and assign the return value to 

But it doesn’t work and returns Invalid Syntax error. I expect the result to be this:

z == 2
x.array == [[[1, 2, 3]]]

What should I do?