python之类型错误 : can only concatenate tuple (not "vector") to tuple

我是 python 和 pygame 的新手，我正在尝试学习向量和类的基础知识，但在这个过程中我搞砸了，而且我在理解和修复标题中的错误消息方面苦苦挣扎。

这是我的 Vector 类的代码:

import math 
 
class Vector(object): 
 
    #defaults are set at 0.0 for x and y 
    def __init__(self, x=0.0, y=0.0): 
        self.x = x 
        self.y = y 
 
    #allows us to return a string for print 
    def __str__(self): 
        return "(%s, %s)"%(self.x, self.y) 
 
    # from_points generates a vector between 2 pairs of (x,y) coordinates 
    @classmethod 
    def from_points(cls, P1, P2): 
        return cls(P2[0] - P1[0], P2[1] - P1[1]) 
 
    #calculate magnitude(distance of the line from points a to points b 
    def get_magnitude(self): 
        return math.sqrt(self.x**2+self.y**2) 
 
    #normalizes the vector (divides it by a magnitude and finds the direction) 
    def normalize(self): 
        magnitude = self.get_magnitude() 
        self.x/= magnitude 
        self.y/= magnitude 
 
    #adds two vectors and returns the results(a new line from start of line ab to end of line bc) 
    def __add__(self, rhs): 
        return Vector(self.x +rhs.x, self.y+rhs.y) 
 
    #subtracts two vectors 
    def __sub__(self, rhs): 
        return Vector(self.x - rhs.x, self.y-rhs.y) 
 
    #negates or returns a vector back in the opposite direction 
    def __neg__(self): 
        return vector(-self.x, -self.y) 
 
    #multiply the vector (scales its size) multiplying by negative reverses the direction 
    def __mul__(self, scalar): 
        return Vector(self.x*scalar, self.y*scalar) 
 
    #divides the vector (scales its size down) 
    def __div__(self, scalar): 
        return Vector(self.x/scalar, self.y/scalar) 

这是我的程序的代码:

#The simple mouse move game by Ramon Cabral 
 
 
#imports 
import pygame, sys, Vector 
from pygame.locals import * 
 
#game init 
pygame.init() 
 
#screen 
screen = pygame.display.set_mode((800,600),0,32) 
 
#images 
mouse_file = 'mouse.png' 
MOUSE = pygame.image.load(mouse_file).convert_alpha() 
 
 
#variables 
bgcolor = (255,255,255) 
position = (100.0,100.0) 
heading = Vector.vector() 
 
#clock and speed 
clock = pygame.time.Clock() 
speed = 250.0 
 
 
#main game function 
while True: 
 
    for event in pygame.event.get(): 
        if event.type == QUIT: 
            pygame.quit() 
 
        if event.type == MOUSEBUTTONDOWN: 
            destination = pygame.mouse.get_pos() 
            heading = Vector.vector.from_points(position, destination) 
            heading.normalize() 
 
    screen.fill(bgcolor) 
    screen.blit(MOUSE, position) 
 
    time_passed = clock.tick(30.) 
    time_passed_seconds = time_passed/1000.0 
 
    distance_moved = time_passed_seconds*speed 
    position += heading * distance_moved 
 
    pygame.display.update() 

请您参考如下方法:

给你的类一个元组方法:

class Vector(object): 
    ... 
 
    def tuple(self): 
        return (self.x, self.y) 

改变:

position = (100.0,100.0) 

收件人:

position = Vector.vector(100.0,100.0) 

和:

screen.blit(MOUSE, position) 

收件人:

screen.blit(MOUSE, position.tuple()) 

您正在添加不兼容的类型。