python vector2

class vector2:
    def __init__(self, x_or_vec2, y=None):
        self.x, self.y  = self.__check(x_or_vec2, y)
        #self.value = [self.x, self.y]

    def __check(self, x_or_vec2, y=None):
        if y == None:
            x = x_or_vec2[0]
            y = x_or_vec2[1]
        else:
            x = x_or_vec2
            y = y
        return int(x), int(y)

    def toString(self, withDot=True):
        if withDot:
            return "".join([str(self.x), ", ", str(self.y)])
        else:
            return "".join([str(self.x), " ", str(self.y)])
    def Value(self):
        return [self.x, self.y]
    def reduce(self, x_or_vec2, y=None):
        x, y = self.__check(x_or_vec2, y)
        self.x = self.x - x
        self.y = self.y - y
    def increase(self, x_or_vec2, y=None):
        x, y = self.__check(x_or_vec2, y)
        self.x = self.x + x
        self.y = self.y + y
    def dive(self, x_or_vec2, y=None):
        x, y = self.__check(x_or_vec2, y)
        print x, y
        self.x = self.x / x
        self.y = self.y / y
    def multiply(self, x_or_vec2, y=None):
        x, y = self.__check(x_or_vec2, y)
        self.x = self.x * x
        self.y = self.y * y