[已解决]这个为什么报错呀，想了半天没有明白

御坂19090

import asyncio
import time

async def func1():
    print("你好啊，我是1")
    await asyncio.sleep(3)
    print("你好啊，我是1")


async def func2():
    print("你好啊，我是2")
    await asyncio.sleep(2)
    print("你好啊，我是2")


async def func3():
    print("你好啊，我是3")
    await asyncio.sleep(4)
    print("你好啊，我是3")


if __name__ == '__main__':
    f1 = func1()  # 此时的函数是异步协程函数。此时函数执行得到的是一个协程对象
    f2 = func2()
    f3 = func3()
    # asyncio.run(f1)  #协程程序运行需要asyncio模块的支持
    tasks = [
        f1, f2, f3
    ]
    t1 = time.time()
    # 一次性启动多个任务(协程)
    asyncio.run(asyncio.wait(tasks))
    t2 = time.time()
    print(t2 - t1)

最佳答案

月排行榜 / 总排行榜

isdkz

2023-2-11 12:51:48

这个python3.11的问题，python3.11直接传一个协程对象会报错，得传 task

参考文章：
https://blog.csdn.net/m0_69082030/article/details/124327891
https://stackoverflow.com/questi ... -running-event-loop

参考代码：

import asyncio
import time

async def func1():
    print("你好啊，我是1")
    await asyncio.sleep(3)
    print("你好啊，我是1")


async def func2():
    print("你好啊，我是2")
    await asyncio.sleep(2)
    print("你好啊，我是2")


async def func3():
    print("你好啊，我是3")
    await asyncio.sleep(4)
    print("你好啊，我是3")


if __name__ == '__main__':
    f1 = func1()  # 此时的函数是异步协程函数。此时函数执行得到的是一个协程对象
    f2 = func2()
    f3 = func3()
    t1 = time.time()
    loop = asyncio.new_event_loop()
    tasks = [
        loop.create_task(i) for i in [f1, f2, f3]
    ]
    loop.run_until_complete(asyncio.wait(tasks))
    t2 = time.time()
    print(t2 - t1)

跳转到最佳答案楼层

isdkz

这个python3.11的问题，python3.11直接传一个协程对象会报错，得传 task

参考文章：
https://blog.csdn.net/m0_69082030/article/details/124327891
https://stackoverflow.com/questi ... -running-event-loop

参考代码：

import asyncio
import time

async def func1():
    print("你好啊，我是1")
    await asyncio.sleep(3)
    print("你好啊，我是1")


async def func2():
    print("你好啊，我是2")
    await asyncio.sleep(2)
    print("你好啊，我是2")


async def func3():
    print("你好啊，我是3")
    await asyncio.sleep(4)
    print("你好啊，我是3")


if __name__ == '__main__':
    f1 = func1()  # 此时的函数是异步协程函数。此时函数执行得到的是一个协程对象
    f2 = func2()
    f3 = func3()
    t1 = time.time()
    loop = asyncio.new_event_loop()
    tasks = [
        loop.create_task(i) for i in [f1, f2, f3]
    ]
    loop.run_until_complete(asyncio.wait(tasks))
    t2 = time.time()
    print(t2 - t1)

isdkz

我运行没有问题

鱼cpython学习者

我这里正常运行

御坂19090

实在想不明白

C:\Users\misaka\AppData\Local\Programs\Python\Python311\python.exe C:\Users\misaka\PycharmProjects\pythonProject\爬虫\第四章\协程.py 
Traceback (most recent call last):
  File "C:\Users\misaka\PycharmProjects\pythonProject\爬虫\第四章\协程.py", line 32, in <module>
    asyncio.run(asyncio.wait(tasks))
  File "C:\Users\misaka\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 190, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "C:\Users\misaka\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\misaka\AppData\Local\Programs\Python\Python311\Lib\asyncio\base_events.py", line 650, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "C:\Users\misaka\AppData\Local\Programs\Python\Python311\Lib\asyncio\tasks.py", line 415, in wait
    raise TypeError("Passing coroutines is forbidden, use tasks explicitly.")
TypeError: Passing coroutines is forbidden, use tasks explicitly.
sys:1: RuntimeWarning: coroutine 'func1' was never awaited
sys:1: RuntimeWarning: coroutine 'func2' was never awaited
sys:1: RuntimeWarning: coroutine 'func3' was never awaited