OptionContext.setIgnoreUnknownOptions

Sets whether to ignore unknown options or not. If an argument is ignored, it is left in the argv array after parsing. By default, [glib.option_context.OptionContext.parse] treats unknown options as error.

This setting does not affect non-option arguments (i.e. arguments which don't start with a dash). But note that GOption cannot reliably determine whether a non-option belongs to a preceding unknown option.