Steven Bethard <steven.beth...@gmail.com> added the comment: It's an ArgumentTypeError because that's what you're supposed to raise inside type functions:
http://docs.python.org/dev/library/argparse.html#type (Note that argparse.FileType.__call__ is what will be called when we pass type=argparse.FileType(...) to add_argument.) The current docstring for ArgumentTypeError is correct - it says it's "An error from trying to convert a command line string to a type" and we're converting a file path (string) into a file object. But I certainly wouldn't complain if someone wanted to make the wording there clearer. Basically the rule is: * Use ArgumentTypeError when you're defining a type= function * Use ArgumentError otherwise ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue9509> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
