class Point(object):

    POINT_ID = 0 # Class Attribute

    def __init__(self, x=0, y=0):
        self.x = x
        self.y = y
        self.point_id = Point.POINT_ID
        Point.POINT_ID += 1 #Increment class attribute each time an instance of the class is created

    def __add__(self, other): #Overload the '+' operator
        newx = self.x + other.x
        newy = self.y + other.y
        return Point(newx, newy)

    def __iadd__(self, other): #Overload the '+=' operator
        z = self + other
        self.x = z.x
        self.y = z.y
        return self

    def __gt__(self, other): #Overload the '>' operator (you get '<' for free!)
        if self.x > other.x and self.y > other.y:
            return True
        return False

    def __len__(self): #Overload the len() function
        return ((self.x - 0)**2+(self.y-0)**2)**0.5

    def __str__(self): #You can now print your points
        return "({}, {})".format(self.x, self.y)


def main():
    p1 = Point(1, 2)
    p2 = Point(3, 4)
    p3 = p1 + p2
    p1 += p2
    print(p3)
    print(p1)
    print(p1 > p2)
    print(len(p1))

if __name__=="__main__":
    main()