Why I can't fetch responses from aiohttp in cycle? Exception: ValueError: I/O operation on closed file + aiohttp.payload.LookupError

Question

当我试图从周期中的每个 api_key 获得响应时，我总是对两个错误感到困惑 - ValueError: I/O operation on closed file AND aiohttp.payload.LookupError...

async def get_api_response(photo_bytes, api_key, language):
    async with aiohttp.ClientSession() as session:
        async with session.post(URL_API,
                                data={
                                    "picture.png": photo_bytes,
                                    "apikey": api_key,
                                    "language": language
                                }) as response:
            return await response.text()

它是对 API

的异步请求的异步函数

for api_key in API_KEYS:
    response = json.loads(await get_api_response(photo_bytes=photo_bytes, api_key=api_key, language=photo_lang))
    print(response)

这是有结果的循环↑

但是当我尝试在函数中实现循环时 - 给出了相同的结果。但是当我在没有循环的情况下调用函数时 - 它起作用了！如何通过最小的更改来解决这个问题？

UPD：在研究过程中，我注意到它发生在第一个周期后 PHOTO_BYTES 关闭 。

这里是初始化photo_bytes:

photo = cv2.imread(photo_path)
unused_var, compressed_image = cv2.imencode('.png', photo, [1, 90])
photo_bytes = io.BytesIO(compressed_image)

Answer 1

喜欢这样的东西

with io.BytesIO(compressed_image) as f:
    photo_bytes = f.read()

Why I can't fetch responses from aiohttp in cycle? Exception: ValueError: I/O operation on closed file + aiohttp.payload.LookupError

Why I can't fetch responses from aiohttp in cycle? Exception: ValueError: I/O operation on closed file + aiohttp.payload.LookupError

python

python-requests

python-asyncio

aiohttp