CODEWITHSUNDEEP
pythonpython-3.xerror-handlingdiscord.py
user14766510
user14766510

Reputation:

discord py - error handling with on_command_error

I need help with the error handling in discord.py. I want to send the server owner a private message if my bot doesn't have enough rights for a command or if my bots fail something (reason not enough rights) with the right, that he needs.

Now I searched a lot and can't find a good example that shows this. I know how to send the Owner a private message, but the "isinstance" thing confuses me very hard, I never used it before. But this is an important feature, that I would love to integrate.

Upvotes: 2

Views: 16114

Answers (1)

Jacob Lee
Jacob Lee

Reputation: 4700

Preface: Since you are talking about error handling, I am assuming that the member is trying to use a command, but the bot does not have enough permissions to properly execute the function body of the command.

Sample Solution

@commands.command(name="kick")
@commands.has_permissions(kick_members=True)
async def kick(ctx, members, *, reason=None):
    await member.kick(reason=reason)

@kick.error
async def kick_error(error, ctx):
    if isinstance(error, commands.MissingPermissions):
        owner = ctx.guild.owner
        direct_message = await owner.create_dm()
        await direct_message.send("Missing Permissions")

Details

The isinstance() function is a Python built-in function which takes two arguments, object and classinfo. The function returns whether or not the object argument is an instance of classinfo. In this case, the error caused by the bot not having enough permissions raises a discord.ext.commands.MissingPermissions error.

The isinstance() function in this case checks if the exception raised is an instance of commands.MissingPermissions. If the exception is the discord.ext.commands.MissingPermissions error, then isinstance() will return True.

The code of the if clause is easier to understand. The owner of the guild (as a discord.Member object) is stored as an attribute of discord.Guild objects; in this case, ctx.guild.owner. Since the object is a discord.Member object, the create_dm() classmethod can be called to create a private direct message channel. In that channel, the message is sent.

Upvotes: 4

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