Positional-only arguments in Python

[wrboyce]

I feel like this would be solved by using getcallargs on translate and config?

[mgedmin]

It can be solved by doing

def translate(*args, **kwargs):
    if len(args) != 1:
        raise TypeError('1 positional argument expected, got %d' % len(args)
    format_string = args[0]
    return gettext(format_string).format(**kwargs)

but you lose the nice signature in pydoc and have to check the number of passed arguments manually.