@classdef.method("[]")
    @classdef.method("slice")
    def method_subscript(self, space, w_idx, w_count=None):
        start, end, as_range, nil = space.subscript_access(self.length(), w_idx, w_count=w_count)
        if nil:
            return space.w_nil
        elif as_range:
            assert start <= 0
            assert end >= 0
            return W_ArrayObject(space, self.items_w[start:end], space.getnonsingletonclass(self))
        else:
            return self.items_w[start]
dataset/ETHPy150Open topazproject/topaz/topaz/objects/arrayobject.py/W_ArrayObject.method_subscript/operator `>=` -> `<=`