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Arbitrarily ordered arguments for commands in

Project description


Provides support for arbitrarily ordered arguments in commands for the library.

param_converter = ArgumentConverter(
    turns = RequiredArgument(
        doc="The number of turns this quiz has.",
    images = OptionalArgument(
        doc="(Dis-)allow image questions.",
    voice_channel = OptionalArgument(

# The command below can be called by ...
# !quiz pokemon
# !quiz pokemon turns=12
# !quiz pokemon images=false turns=12

async def quiz(ctx, name:str, *, params:param_converter=param_converter.defaults()):
    await ctx.send("Turns: {0}".format(params['turns']))

async def quiz_error(ctx, error):
    if isinstance(error, InvalidArgumentValueError):
        await ctx.send(
            "Invalid argument value for parameter {0}".format(
    elif isinstance(error, UnknownArgumentError):
        await ctx.send(
            "Unknown argument {0}".format(


Simply drop the source file anywhere in your project. Installation via pip is not available at the moment.


Initialize an ArgumentConverter as in the example above, annotate a keyword-only function argument in your command with the instance and, optionally, set its default value by using the .defaults() method. Setting a default value can be omitted if you use required arguments (otherwise it will raise a MissingRequiredArgument exception).

Inside the command, you can access the arguments as a dict.

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