New submission from Peter Eckersley: When argparse lists the default values for cli flags and arguments, it shows argparse's view of the internal Pythonic default, not the default behaviour of the program as a whole. This can be wrong in many cases, as documented at https://bugs.python.org/issue27153 and https://github.com/certbot/certbot/issues/3734.
To mitigate this, we should allow the caller to set arbitrary strings that argparse will display to the user as the "default" in the CLI help. I wrote a first patch to do this via a new "help_default" argument that can be added to argparse actions: https://gist.github.com/pde/daec08cadc21bca0d62852020887ee13 The patch was written against argparse.py from Python2.7, but seems to apply and run okay against the Python 3.x version. ---------- messages: 281183 nosy: pde priority: normal severity: normal status: open title: argparse.ArgumentDefaultsHelpFormatter sometimes provides inaccurate documentation of defaults, so they should be overrideable versions: Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28742> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
