使用math中的hypot实现向量

from math import hypot

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

    def __repr__(self): return 'Vector(%r,%r)'%(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, other): # * return Vector(self.x * scalar,self.y * scalar)