геометрия шаблон

from math import *


class vector:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def vector_from_dots(self, a, b):
        return vector(b.x - a.x, b.y - a.y)

    def __add__(self, other):
        return vector(self.x + other.x, self.y + other.y)

    def __sub__(self, other):
        return vector(self.x - other.x, self.y - other.y)

    def __mul__(self, other): #скалярное произведение
        return self.x * other.x + self.y * other.y

    def __xor__(self, other): #векторное произведение
        return self.x * other.y - self.y * other.x

    def len(self):
        return sqrt(self.x * self.x + self.y * self.y)


a = vector(1, 2)
b = vector(4, 5)
c = a + b
d = a - b
print(a.x, a.y)