# x = {1: 20, 3: 40, 4: 30, 2: 10, 0: 0}

# list_of_tuple =  sorted(x.items(), key=lambda item: item[0])
# print([ v for k, v in list_of_tuple])

# print( { k: v for k, v in sorted(x.items(), key=lambda item: item[0])} )


l = [5, 8, 2, 4, 1, 10, None]


class test:
    def __init__(self, l) -> None:
        self.l = l

    def print(self):
        print(l)

t = test(l)

l.sort(key=lambda x: (x is None, x))

t.print()