class myObject:
    def __init__(self):
        self._arr = [1,2,3]

    def __len__(self):
        return len(self._arr)

    def __getitem__(self, position):
        return self._arr[position]

from math import hypot

class Vector:
    def __init__(self, x=0, y=0):
        self.x = x
        self.y = y

    def __repr__(self):  # 객체를 문자열로 표현
        return 'Vector({!r}, {!r})'.format(self.x, self.y)

    def __abs__(self):  
        return hypot(self.x, self.y)

    def __bool__(self):
        return bool(abs(self))

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

    def __mul__(self, scalar):
        return Vector(self.x * scalar, self.y * scalar)

    def __rmul__(self, scalar):  # scalar가 왼쪽에 오는 곱셈을 가능케 해줌
        return Vector(self.x * scalar, self.y * scalar)