(3, 2, 1) + (4, 3, 2) = (7, 5, 3) になるような Point クラス

__init__.py

# -*- coding: utf-8 -*-
class Point:
    def __init__(self, *vectors):
        self.vectors = vectors

    def __str__(self):
        return str(self.vectors)

    def __iter__(self):
        return self.vectors.__iter__()

    def __sub__(self, point):
        return Point(*[v1 - v2 for v1, v2 in zip(self, point)])

    def __add__(self, point):
        return Point(*[v1 + v2 for v1, v2 in zip(self, point)])