（discord.py）我想为一个不和谐的服务器做一个点名机器人

Question

我想做一个不和谐的机器人。这就是我想要的：当我说“！yoklama 11.10.2020.txt”（或其他内容）时，机器人会向我发送我所在语音频道的参与者列表。[不是 1 个频道（我所在的频道）] 但我不知道我该怎么做。 然后我进行了一些研究，我发现我的要求有类似的事情。 但他们没有正常工作。 这是我找到的代码：

import discord
from discord.ext.commands import Bot
from discord.ext import commands

client = commands.Bot(command_prefix='!')

@client.command()
async def attendance(ctx, filename):
    channel = client.get_channel(755129236397752441) # Replace with voice channel ID

    with open(filename, 'w') as file:
        for member in channel.members:
            file.write(member.name + '\n')


client.run('mytoken')

此代码正在运行（当我运行时它们不会给我错误）但是当我说 !attendence test.txt bot 什么也没说，我的 python shell 对我说：

Ignoring exception in command attendance:
Traceback (most recent call last):
  File "C:\Users\Yunus Emre KISA\AppData\Local\Programs\Python\Python38-32\lib\site- 
packages\discord\ext\commands\core.py", line 85, in wrapped
    ret = await coro(args, **kwargs)
  File "C:\bot2\bot2.py", line 10, in attendance
    for member in channel.members:
AttributeError: 'NoneType' object has no attribute 'members'

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

Traceback (most recent call last):
  File "C:\Users\Yunus Emre KISA\AppData\Local\Programs\Python\Python38-32\lib\site- 
packages\discord\ext\commands\bot.py", line 903, in invoke
    await ctx.command.invoke(ctx)
  File "C:\Users\Yunus Emre KISA\AppData\Local\Programs\Python\Python38-32\lib\site- 
packages\discord\ext\commands\core.py", line 859, in invoke
    await injected(ctx.args, **ctx.kwargs)
  File "C:\Users\Yunus Emre KISA\AppData\Local\Programs\Python\Python38-32\lib\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: AttributeError: 
'NoneType' object has no attribute 'members

你们看，我什么都不懂，请帮帮我。 我发现了这些问题，但它对我不起作用： Discord Python bot creating a file of active member in a vocal channel

Answer 1

@client.command()
async def test(ctx):
    guild = ctx.guild
    channel = discord.utils.get(guild.voice_channels, name='General')

    for member in channel.members:
        print('test')

我会做的而不是在命令中传递文件，只是在函数编写中：

with open("file.txt", "w") as f: