提问人：emsiloader 提问时间：5/22/2023 最后编辑：NicPWNsemsiloader 更新时间：5/23/2023 访问量：52
如何在Python中添加一个单独的线程以避免应用程序延迟？
How to add a separate thread in Python to avoid delays in the app?
问：
我正在用 Python 开发一个非常简单的游戏。
在游戏中，当玩家击中弹跳球时，我调用一个名为的函数，该函数将 GET 或 POST 发送到位于我计算机中的远程 API，如下所示：sayThis()
def sayThis(param):
try:
api_url = param
#param is here : http://localhost:54300/apistomach/say?text=great&blocking=true
response = requests.post(api_url)
response.json()
except:
print("service error occurred! check API connection ")
在我调用函数的游戏代码中：sayThis()
while contGame: #a flag to continue the game
if (#conditions here)
sayThis("http://localhost:54300/apistomach/say?text=great&blocking=true")
代码运行良好，但是当我得到这一行时，游戏会暂停超过一秒钟（有时更多）并等待 API 的响应。这很令人沮丧，因为游戏冻结了。
如何解决此问题？
例如，我怎样才能创建第二个线程，并仅在“当玩家可以击球（得分）时”调用（运行）这个线程？
PS：我在一个文件中开发了我的游戏。main.py
谢谢
答：
1赞
Mark Setchell
5/22/2023
#1
我会启动第二个过程（你甚至可以得到一个重量更轻的线程）并让它继续运行。它可以阻止，等待消息并在消息到达时说出来，然后返回等待下一个消息。然后，主程序只需要发送一条快速消息，而不是等待一个缓慢的同步 API。
#!/usr/bin/env python3
from multiprocessing import Process, Queue
def announce(q):
# This runs as a separate process, waiting for messages and announcing them
print('[ANNOUNCER] Started')
while True:
# Block, waiting for messages to announce
message = q.get()
if message is None:
break
print(f'[ANNOUNCER] Received: {message}')
# Your API call goes here
api_url = xxx
response = requests.post(api_url)
print('[ANNOUNCER] done')
if __name__ == "__main__":
# Create a queue to pass messages to announcer process
q = Queue(8)
print('[MAIN] Started')
# Create and start announcer process
announcer = Process(target=announce, args=(q,))
announcer.start()
# Run your existing main program here
for _ in range(10):
# Put a message in the queue to be announced
q.put("message")
# Tell announcer we are finished and it should exit
q.put(None)
# Wait for it to exit
announcer.join()
print('[MAIN] ended')
示例输出
[MAIN] Started
[ANNOUNCER] Started
[ANNOUNCER] Received: message
[ANNOUNCER] Received: message
[ANNOUNCER] Received: message
[ANNOUNCER] Received: message
[ANNOUNCER] Received: message
[ANNOUNCER] Received: message
[ANNOUNCER] Received: message
[ANNOUNCER] Received: message
[ANNOUNCER] Received: message
[ANNOUNCER] Received: message
[ANNOUNCER] done
[MAIN] ended
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