Axel <p...@jejajo.de> added the comment:
Thanks for so fast looking into this. Good idea to use the workaround with a own conversion function. I'll use this for now. To see what's happening, I tried a own Action with print in __call__ and a own conversion function with printing. I found following workflow: 1) direct assignment of unconverted default value (if not SUPPRESS, in parse_known_args) 2) conversion of argument string into given type 3) call to Action.__call__ which sets the converted value 4) only in edge cases: Convert default into given type and set in target When there is no option there is only: default | arg, narg = '?' | --opt | arg, narg = '*' ----------------------------------------------------- None | 1), 3) | 1) | 1), 2) with [] SUPPRESS | 2)! | | str | 1), 2), 3) | 1) | 1), 2) not str* | 1), 3) | 1), 4) | 1), 2) *can be int, float or other calss It gets more complex the deeper I get into the source... Yes, your second choice has probably less side effects. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue36078> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
