我收到一条错误消息，显示 AttributeError: 'str' object has no attribute 'read' 我不知道如何修复它

Question

    @commands.command()
    async def trash(self, ctx, user: discord.Member):
        auth = str(os.getenv("FLIPNOTE_API"))
        url2 = f'https://api.alexflipnote.dev/trash?face={ctx.author.avatar_url_as(format="png")}&trash={user.avatar_url_as(format="png")}'
        headers = {'Authorization': auth}
        async with aiohttp.ClientSession() as session:
            async with session.get(url2, headers=headers) as res:
                link = re.compile(r"(?<=<ClientResponse\()(.*)(?=\))").search(repr(res)).group(1)
                link2 = BytesIO(link)
                image = await link2.read()
                file = discord.File(image, filename="lol.png")
                await ctx.send(file=file)

这是我正在使用的代码，错误是 AttributeError: 'str' object has no attribute 'read' 请告诉我如何解决这个问题，我将不胜感激 这是追溯顺便说一句：

Ignoring exception in on_message
Traceback (most recent call last):
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "/home/runner/DayStride/cogs/fun.py", line 1461, in trashmoment
    link2 = BytesIO(link)
TypeError: a bytes-like object is required, not 'str'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/bot.py", line 903, in invoke
    await ctx.command.invoke(ctx)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py", line 859, in invoke
    await injected(*ctx.args, **ctx.kwargs)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py", line 94, in wrapped
    raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: TypeError: a bytes-like object is required, not 'str'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py", line 71, in wrapped
    ret = await coro(*args, **kwargs)
  File "/home/runner/DayStride/cogs/fun.py", line 1480, in trasherror
    await await ctx.send(error)
TypeError: object NoneType can't be used in 'await' expression

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/client.py", line 333, in _run_event
    await coro(*args, **kwargs)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/bot.py", line 943, in on_message
    await self.process_commands(message)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/bot.py", line 940, in process_commands
    await self.invoke(ctx)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/bot.py", line 907, in invoke
    await ctx.command.dispatch_error(ctx, exc)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py", line 422, in dispatch_error
    await injected(cog, ctx, error)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py", line 77, in wrapped
    raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: TypeError: object NoneType can't be used in 'await' expression

它说 NoneType 不能用于 await 表达式，但我认为主要问题是 str 的东西，但我不确定

Answer 1

link2 = BytesIO(link)
image = await link2.read()

您应该检查 BytesIO(link) 返回值， 因为它似乎是一个字符串。 没有“读取”方法。

你想用你的 caode 做什么？

Answer 2

根据文档： https://docs.python.org/3/library/io.html

In-memory streams
It is also possible to use a str or bytes-like object as a file for
both reading     and writing. For strings StringIO can be used like a
file opened in text mode.
BytesIO can be used like a file opened in binary mode. Both provide full
read-write capabilities with random access.


Buffered Streams
Buffered I/O streams provide a higher-level interface to an I/O device
than raw I/O does.

class io.BytesIO([initial_bytes])
A binary stream using an in-memory bytes buffer. It inherits BufferedIOBase.
The buffer is discarded when the close() method is called.

The optional argument initial_bytes is a bytes-like object that contains
initial data.

看起来你给 BytesIO(link) 构造函数提供了一个字符串参数。链接似乎是一个字符串？但它需要一些字节，而不是字符串。

>>> view = b.getbuffer()
>>> view[2:4] = b"56"
>>> b.getvalue()

所以你必须改变参数类型，或者用 StringIO 代替。 我让你选择并尝试一下。