Python django.core.management.base.BaseCommand 模块，option_list() 实例源码

def __init__(self, *args, **kwargs):
        # Options are defined in an __init__ method to support swapping out
        # custom user models in tests.
        super(Command, self).__init__(*args, **kwargs)
        self.UserModel = get_user_model()
        self.username_field = self.UserModel._meta.get_field(self.UserModel.USERNAME_FIELD)

        self.option_list = BaseCommand.option_list + (
            make_option('--%s' % self.UserModel.USERNAME_FIELD, dest=self.UserModel.USERNAME_FIELD, default=None,
                help='Specifies the login for the superuser.'),
            make_option('--noinput', action='store_false', dest='interactive', default=True,
                help=('Tells Django to NOT prompt the user for input of any kind. '
                    'You must use --%s with --noinput, along with an option for '
                    'any other required field. Superusers created with --noinput will '
                    ' not be able to log in until they\'re given a valid password.' %
                    self.UserModel.USERNAME_FIELD)),
            make_option('--database', action='store', dest='database',
                default=DEFAULT_DB_ALIAS, help='Specifies the database to use. Default is "default".'),
        ) + tuple(
            make_option('--%s' % field, dest=field, default=None,
                help='Specifies the %s for the superuser.' % field)
            for field in self.UserModel.REQUIRED_FIELDS
        )

def __init__(self, **kwargs):
        if self.options:
            self.option_list = self.__class__.option_list + self.options

        super(DanubeCloudCommand, self).__init__(**kwargs)

def create_parser(self, prog_name, subcommand):
        test_runner_class = get_runner(settings, self.test_runner)
        options = self.option_list + getattr(
            test_runner_class, 'option_list', ())
        return OptionParser(prog=prog_name,
                            usage=self.usage(subcommand),
                            version=self.get_version(),
                            option_list=options)

def call_command(name, *args, **options):
    """
    Calls the given command, with the given options and args/kwargs.

    This is the primary API you should use for calling specific commands.

    Some examples:
        call_command('syncdb')
        call_command('shell', plain=True)
        call_command('sqlall', 'myapp')
    """
    # Load the command object.
    try:
        app_name = get_commands()[name]
    except KeyError:
        raise CommandError("Unknown command: %r" % name)

    if isinstance(app_name, BaseCommand):
        # If the command is already loaded, use it directly.
        klass = app_name
    else:
        klass = load_command_class(app_name, name)

    # Grab out a list of defaults from the options. optparse does this for us
    # when the script runs from the command line, but since call_command can
    # be called programatically, we need to simulate the loading and handling
    # of defaults (see #10080 for details).
    defaults = {}
    for opt in klass.option_list:
        if opt.default is NO_DEFAULT:
            defaults[opt.dest] = None
        else:
            defaults[opt.dest] = opt.default
    defaults.update(options)

    return klass.execute(*args, **defaults)

def option_list(self):
        return [x for x in self.options
                if x._long_opts[0] not in self.skip_opts]

def execute(self):
        """
        Given the command-line arguments, this figures out which subcommand is
        being run, creates a parser appropriate to that command, and runs it.
        """
        # Preprocess options to extract --settings and --pythonpath.
        # These options could affect the commands that are available, so they
        # must be processed early.
        parser = LaxOptionParser(usage="%prog subcommand [options] [args]",
                                 version=get_version(),
                                 option_list=BaseCommand.option_list)
        self.autocomplete()
        try:
            options, args = parser.parse_args(self.argv)
            handle_default_options(options)
        except:
            pass # Ignore any option errors at this point.

        try:
            subcommand = self.argv[1]
        except IndexError:
            subcommand = 'help' # Display help if no arguments were given.

        if subcommand == 'help':
            if len(args) <= 2:
                parser.print_lax_help()
                sys.stdout.write(self.main_help_text() + '\n')
            elif args[2] == '--commands':
                sys.stdout.write(self.main_help_text(commands_only=True) + '\n')
            else:
                self.fetch_command(args[2]).print_help(self.prog_name, args[2])
        elif subcommand == 'version':
            sys.stdout.write(parser.get_version() + '\n')
        # Special-cases: We want 'django-admin.py --version' and
        # 'django-admin.py --help' to work, for backwards compatibility.
        elif self.argv[1:] == ['--version']:
            # LaxOptionParser already takes care of printing the version.
            pass
        elif self.argv[1:] in (['--help'], ['-h']):
            parser.print_lax_help()
            sys.stdout.write(self.main_help_text() + '\n')
        else:
            self.fetch_command(subcommand).run_from_argv(self.argv)