如何将 event.value 用于主循环之外的另一个函数？

Question

下面是我的实际代码的工作框架。我想要做的是获取 JOYAXISMOTION、event.value、y 以便我可以在循环外的不同函数中使用它。我已经定义了变量 y.

import time
import sys
import pygame
import subprocess
import random


from pygame.locals import *
pygame.init()

y = 0

def get_percent_change(current, previous):
    if current == previous:
        return 0
    try:
        return ((float(current) - float(previous)) /abs(previous)) * 100.0
    except ZeroDivisionError:
        return float('inf')

def sendCommands():
    time.sleep(5)
    print('Hello World')

pygame.joystick.init()
joysticks = [pygame.joystick.Joystick(i) for i in range(pygame.joystick.get_count())]
for joystick in joysticks:
    print(joystick.get_name())

game_state = False
run = True

while run:
    for event in pygame.event.get():

        if event.type == JOYBUTTONDOWN:
            print(event)

            if game_state == False and event.button == 8:
                game_state = True

            if event.button == 4:
                game_state = False

        if event.type == JOYHATMOTION:
            if event.value[0] == 1 or event.value[0] == -1:
                game_state = False

        if event.type == JOYAXISMOTION:
            if event.axis == 4:
                current = event.value
                y = get_percent_change(current, -1.0001)
                print(y)

        if event.type == JOYDEVICEADDED:
            joysticks = [pygame.joystick.Joystick(i) for i in range(pygame.joystick.get_count())]
            for joystick in joysticks:
                print(joystick.get_name())
        if event.type == JOYDEVICEREMOVED:
            joysticks = [pygame.joystick.Joystick(i) for i in range(pygame.joystick.get_count())]


    if game_state == True:
        sendCommands()

pygame.quit()
sys.exit()

我运行遇到的主要问题是 sendCommands 需要的 time.sleep(5)。它在睡觉时阻止脚本。我尝试过 asyncio 但没有成功。线程在这里也让我很困惑。我还尝试了提供给一个密切相关的问题 here 的答案中的延迟逻辑，但这也阻止了来自运行ning.

的代码

请允许我就如何进行思考：

我可以运行脚本而不被阻止
以及如何在循环外访问和使用 event.value、y

Answer 1

要在循环外使用 y，您可以将其声明为全局的，但更好的替代方法是创建一个函数来获取值。您可以实现一个计时器来每 5 秒执行一次子进程，而不是阻塞整个线程。以下代码每 5 秒为我打印一次 None，因为我没有连接任何控制器，但我认为它对你有用。

import time
import sys
import pygame
from pygame.locals import *

pygame.init()

def sendCommands(waitTime, y):
    global sendCommandsStart
    #count how many seconds have passed since sendCommandsStart
    #variable was last updated
    if time.time() - sendCommandsStart > waitTime:
        sendCommandsStart = time.time() #reset the timer
        print(y)#call your subpreocess here

def getJoyStickY(events):
     for event in events:
         if event.type == JOYAXISMOTION:
            if event.axis == 4:
                return get_percent_change(current, -1.0001)
     return None

pygame.joystick.init()
run = True

sendCommandsStart = time.time() #get the current time - its just a number (time since last epoh)

while run:
    allEvents = pygame.event.get()
    sendCommands(5, getJoyStickY(allEvents))

    
pygame.quit()
sys.exit()

如何将 event.value 用于主循环之外的另一个函数？

How to use event.value for another function outside of the main loop?

pygame

delay

python-3.x