从 Discord.py 执行 Python 命令

Question

So what I want to do is that I want to create an evaluation command in discord.py. So when the user says

.evaluate print("hi")

I want it to to send the code to python and run it. I seen ways with subprocess.Popen or os.system or system generally, but it only runs shell commands. I was wondering how I do this?

Answer 1

You can use the python eval() function. Of course allowing people to execute commands in your script is a security risk, please proceed with extreme caution. Not sure what you are trying to accomplish, this type of activity should be avoided.

Try:

@client.command()
async def evaluate(ctx, *, cmd=None):
    try:
        eval(cmd)
        await ctx.send(f'Your bot friend executed your command --> {cmd}')
    except:
        print(f'{cmd} is an invalid command')
        await ctx.send(f'Your bot friend could not execute an invalid command --> {cmd}')

Console Output

None is an invalid command
hi
nocommand(junk) is an invalid command

Discord dialog (using a "?" prefix instead of ".":

Answer 2

import contextlib
import io
@bot.command()
async def eval(ctx, *, code):
    str_obj = io.StringIO() #Retrieves a stream of data
    try:
        with contextlib.redirect_stdout(str_obj):
            exec(code)
    except Exception as e:
        return await ctx.send(f"```{e.__class__.__name__}: {e}```")
    await ctx.send(f'```{str_obj.getvalue()}```')

Keep in mind, the example above is very simple, and can be expanded on. For example, exec has a globals argument so that you can use global(pre-defined) variables in your eval statements. You can even format your code so that you can include: ```py

{your code here}```

around your eval command. Whatever you do, make sure no one has access to your eval command but you . Seriously, they might as well be sitting at your computer if they have access to it.

Answer 3

Here is the command being owner only.

@client.command()
@commands.is_owner()
async def evaluate(ctx, *, cmd=None):
    try:
        eval(cmd)
        await ctx.send(f'Your bot friend executed your command --> {cmd}')
    except:
        print(f'{cmd} is an invalid command')
        await ctx.send(f'Your bot friend could not execute an invalid command --> {cmd}')