vector-of-pairs.py

main.py

class CustomList:
    def __init__(self):
        self.data = []

    def store(self, first, second):
        self.data.append((first, second))

    def print(self, lookup):
        def print_iter(lookup, dots=0):
            print(".." * dots + str(lookup))
            for first, second in self.data:
                if first == lookup:
                    print_iter(second, dots + 1)

        print_iter(lookup)


# Example usage
custom_list = CustomList()
custom_list.store(1, 2)
custom_list.store(1, 3)
custom_list.store(3, 4)
custom_list.store(4, 5)

print(custom_list.data)

custom_list.print(1)