gistfile1.py

	    def _require_single_keyword_arg(self, **kwargs):
        provided_params = [name for name, value in kwargs.iteritems() if value]
        if not provided_params: raise VE('Something must be passed in')
        if len(provided_params) != 1:
            msg = _('Only a single keyword arg allowed: received %s') % ', '.join(provided_params)
            raise exception.ValidationError(msg)