paul j3 added the comment: The code that converts '-' to '_' is independent of the code that uses 'prefix_chars'.
The '-' conversion handles a long standing UNIX practice of allowing that character in the middle of option flags. It's an attempt to turn such flags into valid variable names. There is a bug/issue about whether the conversion should be applied to positional argument 'dest' parameters. Is the use of other funny characters in optional flags common enough to warrant a patch? It probably wouldn't be hard to convert all 'prefix_chars' to '_'. But should it still convert '-', even if it isn't in that list? What about users who are content with using 'getattr', and don't want the conversion? Note also that you can invoke `parse_args` with your own custom Namespace object. https://docs.python.org/3.4/library/argparse.html#the-namespace-object This means you can write a Namespace class alternative that can handle funny characters in any way you want. I discuss the use of custom Namespace classes in http://bugs.python.org/issue9351. Between the availability of 'getattr' and namespace customization, I don't think there's anything here that requires a patch. But I'm in favor of keeping the issue open for discussion. ---------- nosy: +paul.j3 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue24338> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
