id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
32177	ManagementUtility instantiates CommandParser without passing already-computed prog argument	William Schwartz	William Schwartz	"`ManagementUtility` [https://github.com/django/django/blob/354c1524b38c9b9f052c1d78dcbfa6ed5559aeb3/django/core/management/__init__.py#L188-L192 goes to the trouble] to parse the program name from the `argv` it's passed rather than from `sys.argv`: 


{{{
#!python
    def __init__(self, argv=None):
        self.argv = argv or sys.argv[:]
        self.prog_name = os.path.basename(self.argv[0])
        if self.prog_name == '__main__.py':
            self.prog_name = 'python -m django'
}}}


But then when it needs to parse `--pythonpath` and `--settings`, it [https://github.com/django/django/blob/354c1524b38c9b9f052c1d78dcbfa6ed5559aeb3/django/core/management/__init__.py#L347 uses] the program name from `sys.argv`: 


{{{
#!python
        parser = CommandParser(usage='%(prog)s subcommand [options] [args]', add_help=False, allow_abbrev=False)
}}}

Above `""%(prog)s""` [https://docs.python.org/3/library/argparse.html#prog refers] to `sys.argv[0]`. Instead, it should refer to `self.prog_name`. This can fixed as follows:


{{{
#!python
        parser = CommandParser(
            prog=self.prog_name,
            usage='%(prog)s subcommand [options] [args]',
            add_help=False,
            allow_abbrev=False)
}}}

I'm aware that `execute_from_command_line` is a private API, but it'd be really convenient for me if it worked properly in my weird embedded environment where `sys.argv[0]` is [https://github.com/indygreg/PyOxidizer/issues/307 incorrectly] `None`. If passing my own `argv` to `execute_from_command_line` avoided all the ensuing exceptions, I wouldn't have to modify `sys.argv[0]` globally as I'm doing in the meantime."	Bug	closed	Core (Management commands)	dev	Normal	fixed	freezers		Ready for checkin	1	0	0	0	1	0