python - * 之后未通过 render() 参数传递的参数必须是可迭代的，而不是 pygame.Surface

Question

我正在尝试使用 pygame 并试图创建一个这样的类。

import pygame
from threading import Thread

gameExit = True

class states:

    def __init__(self):

        gameDisplay = pygame.display.set_mode((800, 600))
        pygame.display.set_caption('test')

        clock = pygame.time.Clock()

        renderThread = Thread(target=self.render, args =(gameDisplay))
        updateThread = Thread(target=self.update, args = (clock))
        updateThread.start()
        renderThread.start()

    def update(self, clock):
        global gameExit
        while gameExit:
            print('update')
            clock.tick(30)


    def render(self, gamedisplay):
        global gameExit
        print('render')
        while gameExit:
            print('render')
            gameDisplay.fill([255, 255, 255])  # clearing



            pygame.display.update()#update


state = states()

错误代码是 * 之后的 render() 参数必须是可迭代的，而不是 pygame.Surface 为什么它不能通过 gameDisplay/我该怎么做？

这是完整的回溯:

Exception in thread Thread-2:
Traceback (most recent call last):
  File "C:\Users\Marc Frame\AppData\Local\Programs\Python\Python35\lib\threading.py", line 914, in _bootstrap_inner
    self.run()
  File "C:\Users\Marc Frame\AppData\Local\Programs\Python\Python35\lib\threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
TypeError: update() argument after * must be an iterable, not Clock

Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Users\Marc Frame\AppData\Local\Programs\Python\Python35\lib\threading.py", line 914, in _bootstrap_inner
    self.run()
  File "C:\Users\Marc Frame\AppData\Local\Programs\Python\Python35\lib\threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
TypeError: render() argument after * must be an iterable, not pygame.Surface

Answer 1

问题与您传递给 Thread 构造函数的 args 有关。表达式 (gameDisplay) 是对绑定(bind)到 gameDisplay 的 Surface 对象的简单引用，而不是我怀疑您输入的 1 元组。您需要在括号末尾添加一个额外的逗号来告诉 Python 您确实需要一个元组，而不仅仅是为了操作顺序而使用括号:

renderThread = Thread(target=self.render, args=(gameDisplay,))  # add comma
updateThread = Thread(target=self.update, args=(clock,)) # here too