class Vector:
    def __init__(self, x, y):
        self.x = x
        self.y = y
    def __str__(self): # строчное представление
        return "Vector({},{})".format(self.x, self.y)
    def __add__(self, other): # +
        return Vector(self.x + other.x, self.y + other.y)
    def __iadd__(self, other): # +=
        self.x += other.x
        self.y += other.y
    def __mul__(self, other): # *
        if isinstance(other, (int, float)):
            return Vector(self.x * other, self.y * other)
        if isinstance(other, Vector):
            return self.x * other.x + self.y * other.y
        else:
            raise TypeError("неправильный тип")
    def __imul__(self, other):
        if isinstance(other, (int, float)):
            self.x *= other
            self.y *= other
        else:
            raise TypeError("lol")
    def __sub__(self, other): # -
        if isinstance(other, Vector):
            return Vector(self.x - other.x, self.y - other.y)
    def __isub__(self, other): # -=
        if isinstance(other, Vector):
            self.x -= other.x
            self.y -= other.y

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y
    def __str__(self):
        return "Point({},{})".format(self.x, self.y)
'''
a = Vector(3,2)
b = Vector(1,1)
p1 = Point(1,1)
print(a + b)
print(randint(1,10))
'''
help(isinstance)