Python argparse._ Examples

def main(argv=None):
    print(""" _____                  ____    ____   ____ 
 |  _ \  ___  ___ ____ | __ )  / ___) / ___)
 | | \ \/ _ \/ _ \  _ \|  _ \ | |  _ | |    
 | |_/ /  __/  __/ |_) | |_) || |_| || |___ 
 |____/ \___|\___| ___/|____/  \____| \____)
=================|_|===== version """ + __version__ + " =====", file=sys.stderr)
    try:
        run(argv)
    except KeyboardInterrupt:
        print(' Interrupted by the user')
        sys.exit(0)
    except Exception as e:
        message = e.args[0] if e.args else ''
        logging.exception(message)
        logging.error('='*80)
        logging.error('DeepBGC failed with %s%s', type(e).__name__, ': {}'.format(message) if message else '')
        if len(e.args) > 1:
            logging.error('='*80)
            for arg in e.args[1:]:
                logging.error(arg)
        logging.error('='*80)
        exit(1) 

def _parse_handle_files(self, ns):
		if not all(ns.files):
			self.error(_("Invalid path") + ": ''")

		if ns.names_file is not None:
			assert ns.names_file0 is None
			names_file = ns.names_file
			delim = names_file.newlines
			assert delim != ""
		elif ns.names_file0 is not None:
			names_file = ns.names_file0
			delim = "\0"
		else:
			names_file = None

		del ns.names_file, ns.names_file0

		if names_file is not None:
			with names_file:
				ns.files.extend(filter(None, getlines(names_file, delim)))

		if not ns.files:
			self.error(_("No files to add to the archive.")) 

def error(self, message):
        if message != _('too few arguments'):
            super(ArgumentParser, self).error(message) 

def soft_error(self, message):
        """
        Same as error, without the dying in a fire part.
        """

        self.print_usage(sys.stderr)
        args = {'prog': self.prog, 'message': message}
        self._print_message(
            _('%(prog)s: error: %(message)s\n') % args, sys.stderr) 

def unrecognized_arguments_error(self, args):
        self.soft_error(_('unrecognized arguments: %s') % ' '.join(args)) 

def test_error(self):
        stub_stdouts(self)
        parser = ArgumentParser()
        parser.error(_('too few arguments'))
        self.assertEqual('', sys.stdout.getvalue())
        self.assertEqual('', sys.stderr.getvalue()) 

def _match_argument(self, action, arg_strings_pattern):
        # - https://github.com/streamlink/streamlink/issues/971
        # - https://bugs.python.org/issue9334

        # match the pattern for this action to the arg strings
        nargs_pattern = self._get_nargs_pattern(action)
        match = argparse._re.match(nargs_pattern, arg_strings_pattern)

        # if no match, see if we can emulate optparse and return the
        # required number of arguments regardless of their values
        if match is None:
            nargs = action.nargs if action.nargs is not None else 1
            if isinstance(nargs, numbers.Number) and len(arg_strings_pattern) >= nargs:
                return nargs

        # raise an exception if we weren't able to find a match
        if match is None:
            nargs_errors = {
                None: argparse._('expected one argument'),
                argparse.OPTIONAL: argparse._('expected at most one argument'),
                argparse.ONE_OR_MORE: argparse._('expected at least one argument'),
            }
            default = argparse.ngettext('expected %s argument',
                                        'expected %s arguments',
                                        action.nargs) % action.nargs
            msg = nargs_errors.get(action.nargs, default)
            raise argparse.ArgumentError(action, msg)

        # return the number of arguments matched
        return len(match.group(1)) 

def main():
    parser = get_parser()
    args = parser.parse_args()

    try:
        command_name = args.command
        if not command_name:
            return parser.print_help()
    except AttributeError:
        parser.error(argparse._('too few arguments'))

    return run_command(parser, args, command_name) 

def error(self, message):
        if self._usage_on_error and message == argparse._('too few arguments'):
            self.print_help()
            print()
            self.exit(2, argparse._('%s: error: %s\n') % (self.prog, message))
        super(Parser, self).error(message) 

def hyphenate(s):
    return s.replace('_', '-') 

def parse_args(self, args=None, namespace=None):
        args, argv = self.parse_known_args(args, namespace)
        if argv:
            message = argparse._('unrecognized arguments: %s') % ' '.join(argv)
            if hasattr(args, 'cmd') and args.cmd:
                # Show help for specific command, catch exit and print message
                try:
                    super(DeepBGCParser, self).parse_args(args=[args.cmd, '--help'])
                except:
                    pass
            self.exit(2, "{}\n{}\n".format("="*80, message))
        return args 

def load_sources_dir(sourceslist, dirname):
	if not os.path.isdir(dirname):
		termwrap.stderr().print(': '.join(
			(_('Error'), _('No such directory'), dirname)))
		return 1

	import glob
	sourceslist.list.clear()
	foreach(sourceslist.load,
		glob.iglob(os.path.join(dirname, "**/*.list"), recursive=True))
	return 0 

def __init__(self, option_strings, version=None, dest=argparse.SUPPRESS,
		default=argparse.SUPPRESS, help=None
	):
		if help is None:
			help = _("Show program's version number and exit.")
		super().__init__(option_strings, dest, 0, help=help)
		self.version = version 

def _parse_handle_executable(self, ns):
		if ns.executable is NotImplemented:
			refname = "sys.executable"
			self.error(
				_("Unable to determine a default interpreter from the runtime "
					"environment ({:s}={!r}). Please specify it explicitly.")
						.format(refname, eval(refname))) 

def handle_duplicates(sourceslist, apply_changes=None,
	equivalent_schemes=None
):
	"""Interactive disablement of duplicate source entries"""

	stdout = termwrap.stdout()
	stdout_indent1 = stdout.copy(
		subsequent_indent=stdout.subsequent_indent + ' ' * 4)
	stdout_indent2 = stdout_indent1.copy(
		initial_indent=stdout_indent1.subsequent_indent)

	duplicates = tuple(get_duplicates(
		sourceslist, equivalent_schemes=equivalent_schemes))
	if duplicates:
		for dupe_set in duplicates:
			dupe_set = iter(
				sort_dupe_set_by_scheme_class(equivalent_schemes, dupe_set))
			orig = next(dupe_set)
			for dupe in dupe_set:
				stdout.print(_('Overlapping source entries:'))
				for i, se in enumerate((orig, dupe), 1):
					stdout_indent1.print(
						_("{ordinal:2d}. file {file!r}:")
							.format(ordinal=i, file=se.file))
					stdout_indent2.print(se.line)
				stdout.print(_("I disabled all but the first entry."), end="\n\n")
				dupe.disabled = True

		stdout.print(
			_N('{nduplicates:d} source entry was disabled',
				'{nduplicates:d} source entries were disabled',
				len(duplicates)).format(nduplicates=len(duplicates)) + ':')
		stdout_indent2.initial_indent = stdout_indent2.initial_indent[:-2]
		stdout_indent2.print_all(map(str, itertools.chain(*duplicates)), sep='\n')

		if apply_changes is None:
			stdout.file.write('\n')
			answer = (
				Choices(_U('yes'), _U('no'), default='no')
					.ask(_('Do you want to save these changes?')))
			apply_changes = answer is not None and answer.orig == 'yes'
			if not apply_changes:
				termwrap.stderr().print(_('Aborted.'))
				return 2

		if apply_changes:
			sourceslist.save()

	else:
		stdout.print(_('No duplicate entries were found.'))

	return 0 

def handle_empty_files(sourceslist):
	"""Interactive removal of sources list files without valid enabled entries"""

	rv = 0
	total_count = 0
	removed_count = 0

	stdout = termwrap.stdout()
	choices = Choices(
		_U('yes'), _U('no'), _U('all'), _U('none'), _U('display'),
		default='no')
	on_eof = choices.orig['none']
	answer = None

	for total_count, source_entries in enumerate(get_empty_files(sourceslist), 1):
		file = source_entries[0].file

		while answer is None:
			stdout.file.write('\n')
			stdout.print(
				_("'{file:s}' contains no valid and enabled repository lines.")
					.format(file=file))
			answer = choices.ask(_('Do you want to remove it?'), on_eof=on_eof)
			if answer is not None and answer.orig == 'display':
				display_file(file)
				answer = None

		if answer.orig in ('yes', 'all'):
			rv2, rc2 = remove_sources_files(file)
			rv |= rv2
			if rc2:
				removed_count += rc2
				foreach(sourceslist.remove, source_entries)

		if answer.orig not in ('all', 'none'):
			answer = None

	if total_count:
		stdout.file.write('\n')
		stdout.print(
			_('{nremoved:d} of {ntotal:d} empty sourcelist files removed.')
				.format(nremoved=removed_count, ntotal=total_count))

	return rv 

def main(args=None):
	with ArgumentParser() as ap:
		args = ap.parse_args(args)
		quiet = args.quiet
		archive = args.archive
		directory = args.directory
		follow_symlinks = not args.symlinks

		if args.executable:
			shebang = args.executable.join((b"#!", b"\n"))
			archive.fp.write(shebang)
			archive.start_dir += len(shebang)
			del shebang

		if not quiet:
			s_bytes = _("bytes")
			print(
				_("Compressing files into {:s}").format(archive.fp.name),
				end=":\n\n")

		success = 0
		for file in args.files:
			try:
				info = archive.write(
					file, dir_fd=directory, follow_symlinks=follow_symlinks)
			except EnvironmentError as ex:
				print(ex, file=sys.stderr)
			else:
				success += 1
				if not quiet:
					print(
						"{:s} => {:s} ({:4.0%})".format(
							format_size(info.file_size), format_size(info.compress_size),
							not info.file_size or info.compress_size / info.file_size),
						file, sep="  ")

		main_py = "__main__.py"
		if args.executable and main_py not in archive.NameToInfo:
			print(
				_("Warning: Executable Python ZIP archives require a file {!r} in the "
					"archive root directory to work but you omitted it.")
						.format(main_py),
				file=sys.stderr)

	if success:
		print("", _("Everything is OK."), sep="\n")
	return not success