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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def autocomplete(self):
 """ Output completion suggestions for BASH. The output of this function is passed to BASH's `COMREPLY` variable and treated as completion suggestions. `COMREPLY` expects a space separated string as the result. The `COMP_WORDS` and `COMP_CWORD` BASH environment variables are used to get information about the cli input. Please refer to the BASH man-page for more information about this variables. Subcommand options are saved as pairs. A pair consists of the long option string (e.g. '--exclude') and a boolean value indicating if the option requires arguments. When printing to stdout, an equal sign is appended to options which require arguments. Note: If debugging this function, it is recommended to write the debug output in a separate file. Otherwise the debug output will be treated and formatted as potential completion suggestions. """

        # Don't complete if user hasn't sourced bash_completion file.
        if 'DJANGO_AUTO_COMPLETE' not in os.environ:
            return

        cwords = os.environ['COMP_WORDS'].split()[1:]
        cword = int(os.environ['COMP_CWORD'])

        try:
            curr = cwords[cword - 1]
        except IndexError:
            curr = ''

        subcommands = list(get_commands()) + ['help']
        options = [('--help', None)]

        # subcommand
        if cword == 1:
            print(' '.join(sorted(filter(lambda x: x.startswith(curr), subcommands))))
        # subcommand options
        # special case: the 'help' subcommand has no options
        elif cwords[0] in subcommands and cwords[0] != 'help':
            subcommand_cls = self.fetch_command(cwords[0])
            # special case: 'runfcgi' stores additional options as
            # 'key=value' pairs
            if cwords[0] == 'runfcgi':
                from django.core.servers.fastcgi import FASTCGI_OPTIONS
                options += [(k, 1) for k in FASTCGI_OPTIONS]
            # special case: add the names of installed apps to options
            elif cwords[0] in ('dumpdata', 'sql', 'sqlall', 'sqlclear',
                    'sqlcustom', 'sqlindexes', 'sqlsequencereset', 'test'):
                try:
                    app_configs = apps.get_app_configs()
                    # Get the last part of the dotted path as the app name.
                    options += [(app_config.label, 0) for app_config in app_configs]
                except ImportError:
                    # Fail silently if DJANGO_SETTINGS_MODULE isn't set. The
                    # user will find out once they execute the command.
                    pass
            parser = subcommand_cls.create_parser('', cwords[0])
            if subcommand_cls.use_argparse:
                options += [(sorted(s_opt.option_strings)[0], s_opt.nargs != 0) for s_opt in
                            parser._actions if s_opt.option_strings]
            else:
                options += [(s_opt.get_opt_string(), s_opt.nargs) for s_opt in
                            parser.option_list]
            # filter out previously specified options from available options
            prev_opts = [x.split('=')[0] for x in cwords[1:cword - 1]]
            options = [opt for opt in options if opt[0] not in prev_opts]

            # filter options by current input
            options = sorted((k, v) for k, v in options if k.startswith(curr))
            for option in options:
                opt_label = option[0]
                # append '=' to options which require args
                if option[1]:
                    opt_label += '='
                print(opt_label)
        sys.exit(1)