discord.ext.commands.errors.CommandInvokeError：命令引發例外：ValueError：對已關閉檔案的I/O操作

你好！我的不和諧機器人有一個單獨的幫助命令。

class Help(commands.Cog): 
    def __init__(self,client):
        self.client = client
        self.eSantaLogo = discord.File("resources\embedImages\eSanta.png", filename="eSanta.png")

    @commands.group(aliases=["help","commands"], invoke_without_command=True)
    async def help_(self,ctx):
        prefix = ''.join(get_prefix(self.client, ctx))
        embed=discord.Embed(title="eSanta Command Groups",
                            url="https://esanta.me", 
                            color=discord.Color.dark_purple(), 
                            timestamp=datetime.datetime.now(),
                            description=f'Current server prefix: {prefix}')

        embed.set_thumbnail(url='attachment://eSanta.png')
        embed.set_footer(text=f"Requested by {ctx.author.name}")

        embed.add_field(name='**Categories**',value=f"{prefix}help moderator\n{prefix}help fun", inline=True)
        await ctx.send(file=self.eSantaLogo,embed=embed)

def setup(client):
    client.add_cog(Help(client))

當我第一次運行它時，它完全正常。

但是當我嘗試再次運行它時，會引發此例外。

Traceback (most recent call last):
  File "C:\Users\notri\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\client.py", line 343, in _run_event
    await coro(*args, **kwargs)
  File "E:\bot\bot.py", line 104, in on_command_error
    raise error
  File "C:\Users\notri\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\bot.py", line 939, in invoke
    await ctx.command.invoke(ctx)
  File "C:\Users\notri\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 1353, in invoke
    await super().invoke(ctx)
  File "C:\Users\notri\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 863, in invoke
    await injected(*ctx.args, **ctx.kwargs)
  File "C:\Users\notri\AppData\Local\Programs\Python\Python39\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: ValueError: I/O operation on closed file

uj5u.com熱心網友回復：

從檔案中：

檔案物件是一次性使用的，并不意味著可以在多個abc.Messageable.send()s.

您應該在發送檔案后重新加載檔案，這是一個很好的解決方案：

class Help(commands.Cog): 
    def __init__(self,client):
        self.client = client

    @property
    def eSantaLogo(self):
        return discord.File("resources\embedImages\eSanta.png", filename="eSanta.png")

    @commands.group(aliases=["help","commands"], invoke_without_command=True)
    async def help_(self,ctx):
        prefix = ''.join(get_prefix(self.client, ctx))
        embed=discord.Embed(title="eSanta Command Groups",
                            url="https://esanta.me", 
                            color=discord.Color.dark_purple(), 
                            timestamp=datetime.datetime.now(),
                            description=f'Current server prefix: {prefix}')

        embed.set_thumbnail(url='attachment://eSanta.png')
        embed.set_footer(text=f"Requested by {ctx.author.name}")

        embed.add_field(name='**Categories**',value=f"{prefix}help moderator\n{prefix}help fun", inline=True)
        await ctx.send(file=self.eSantaLogo,embed=embed)

默認設定（客戶端）：client.add_cog（幫助（客戶端））

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