我可以使用异步功能从不同的聊天中同时运行相同的命令吗？ [关闭]

Question

我最近开始玩 discord 机器人，但我有一个疑问，那就是是否必须将 async 函数用于 discord 命令。如果是，那么有人可以告诉我区别（根据不和谐的机器人行为）

Answer 1

同步基本上意味着您一次只能执行一件事。异步意味着您可以一次执行多个操作，而不必完成当前操作即可继续执行下一个操作。这是一个异步编程的例子。

import asyncio
import random

async def my_coroutine(id):
    process_time = random.randint(1, 5)
    await asyncio.sleep(process_time)

    print(f'Coroutine: {id}, has succesfully completed after {process_time} seconds')


async def main():
    tasks = []
    for i in range(10):
        tasks.append(asyncio.ensure_future(my_coroutine(i)))

    await asyncio.gather(*tasks)


loop = asyncio.get_event_loop()
loop.run_until_complete(main())
loop.close()

样本输出

Coroutine: 4, has successfully completed after 1 seconds
Coroutine: 7, has successfully completed after 2 seconds
Coroutine: 8, has successfully completed after 2 seconds
Coroutine: 0, has successfully completed after 3 seconds
Coroutine: 1, has successfully completed after 3 seconds
Coroutine: 2, has successfully completed after 4 seconds
Coroutine: 6, has successfully completed after 4 seconds
Coroutine: 3, has successfully completed after 5 seconds
Coroutine: 5, has successfully completed after 5 seconds
Coroutine: 9, has successfully completed after 5 seconds
[Finished in 5.0s]

协程并发执行并在不同的时间完成执行，重要的是要注意这些不按照提交时的相同顺序完成。

这是正常同步编程中的相同代码

import random
import time

def work(id):
    process_time = random.randint(1, 5)
    time.sleep(process_time)

    print(f'Function: {id}, has succesfully completed after {process_time} seconds')


def main():
    for i in range(10):
        work(i)


main()

样本输出

Function: 0, has successfully completed after 5 seconds
Function: 1, has successfully completed after 3 seconds
Function: 2, has successfully completed after 4 seconds
Function: 3, has successfully completed after 2 seconds
Function: 4, has successfully completed after 3 seconds
Function: 5, has successfully completed after 4 seconds
Function: 6, has successfully completed after 2 seconds
Function: 7, has successfully completed after 5 seconds
Function: 8, has successfully completed after 5 seconds
Function: 9, has successfully completed after 1 seconds
[Finished in 24.0s]

所有函数都按照它们被调用的顺序完成。

基本上，如果库是用普通同步代码编写的，您将无法同时使用多个命令/事件，您需要等到前一个完成，然后调用下一个.