How to use the classes.docopt.Option function in classes

usage_sections = parse_section('usage:', doc)
    if len(usage_sections) == 0:
        raise DocoptLanguageError('"usage:" (case-insensitive) not found.')
    if len(usage_sections) > 1:
        raise DocoptLanguageError('More than one "usage:" (case-insensitive).')
    DocoptExit.usage = usage_sections[0]

    options = parse_defaults(doc)
    pattern = parse_pattern(formal_usage(DocoptExit.usage), options)
    # [default] syntax for argument is disabled
    # for a in pattern.flat(Argument):
    #    same_name = [d for d in arguments if d.name == a.name]
    #    if same_name:
    #        a.value = same_name[0].value
    argv = parse_argv(Tokens(argv), list(options), options_first)
    pattern_options = set(pattern.flat(Option))
    for options_shortcut in pattern.flat(OptionsShortcut):
        doc_options = parse_defaults(doc)
        options_shortcut.children = list(set(doc_options) - pattern_options)
        # if any_options:
        #    options_shortcut.children += [Option(o.short, o.long, o.argcount)
        #                    for o in argv if type(o) is Option]
    extras(help, version, argv, doc)
    matched, left, collected = pattern.fix().match(argv)
    if matched and left == []:  # better error message if left?
        return Dict((a.name, a.value) for a in (pattern.flat() + collected))
    raise DocoptExit()

def parse_shorts(tokens, options):
    """shorts ::= '-' ( chars )* [ [ ' ' ] chars ] ;"""
    token = tokens.move()
    assert token.startswith('-') and not token.startswith('--')
    left = token.lstrip('-')
    parsed = []
    while left != '':
        short, left = '-' + left[0], left[1:]
        similar = [o for o in options if o.short == short]
        if len(similar) > 1:
            raise tokens.error('%s is specified ambiguously %d times' %
                               (short, len(similar)))
        elif len(similar) < 1:
            o = Option(short, None, 0)
            options.append(o)
            if tokens.error is DocoptExit:
                o = Option(short, None, 0, True)
        else:  # why copying is necessary here?
            o = Option(short, similar[0].long,
                       similar[0].argcount, similar[0].value)
            value = None
            if o.argcount != 0:
                if left == '':
                    if tokens.current() in [None, '--']:
                        raise tokens.error('%s requires argument' % short)
                    value = tokens.move()
                else:
                    value = left
                    left = ''
            if tokens.error is DocoptExit:

"""long ::= '--' chars [ ( ' ' | '=' ) chars ] ;"""
    long, eq, value = tokens.move().partition('=')
    assert long.startswith('--')
    value = None if eq == value == '' else value
    similar = [o for o in options if o.long == long]
    if tokens.error is DocoptExit and similar == []:  # if no exact match
        similar = [o for o in options if o.long and o.long.startswith(long)]
    if len(similar) > 1:  # might be simply specified ambiguously 2+ times?
        raise tokens.error('%s is not a unique prefix: %s?' %
                           (long, ', '.join(o.long for o in similar)))
    elif len(similar) < 1:
        argcount = 1 if eq == '=' else 0
        o = Option(None, long, argcount)
        options.append(o)
        if tokens.error is DocoptExit:
            o = Option(None, long, argcount, value if argcount else True)
    else:
        o = Option(similar[0].short, similar[0].long,
                   similar[0].argcount, similar[0].value)
        if o.argcount == 0:
            if value is not None:
                raise tokens.error('%s must not have an argument' % o.long)
        else:
            if value is None:
                if tokens.current() in [None, '--']:
                    raise tokens.error('%s requires argument' % o.long)
                value = tokens.move()
        if tokens.error is DocoptExit:
            o.value = value if value is not None else True
    return [o]

def parse_long(tokens, options):
    """long ::= '--' chars [ ( ' ' | '=' ) chars ] ;"""
    long, eq, value = tokens.move().partition('=')
    assert long.startswith('--')
    value = None if eq == value == '' else value
    similar = [o for o in options if o.long == long]
    if tokens.error is DocoptExit and similar == []:  # if no exact match
        similar = [o for o in options if o.long and o.long.startswith(long)]
    if len(similar) > 1:  # might be simply specified ambiguously 2+ times?
        raise tokens.error('%s is not a unique prefix: %s?' %
                           (long, ', '.join(o.long for o in similar)))
    elif len(similar) < 1:
        argcount = 1 if eq == '=' else 0
        o = Option(None, long, argcount)
        options.append(o)
        if tokens.error is DocoptExit:
            o = Option(None, long, argcount, value if argcount else True)
    else:
        o = Option(similar[0].short, similar[0].long,
                   similar[0].argcount, similar[0].value)
        if o.argcount == 0:
            if value is not None:
                raise tokens.error('%s must not have an argument' % o.long)
        else:
            if value is None:
                if tokens.current() in [None, '--']:
                    raise tokens.error('%s requires argument' % o.long)
                value = tokens.move()
        if tokens.error is DocoptExit:
            o.value = value if value is not None else True

assert long.startswith('--')
    value = None if eq == value == '' else value
    similar = [o for o in options if o.long == long]
    if tokens.error is DocoptExit and similar == []:  # if no exact match
        similar = [o for o in options if o.long and o.long.startswith(long)]
    if len(similar) > 1:  # might be simply specified ambiguously 2+ times?
        raise tokens.error('%s is not a unique prefix: %s?' %
                           (long, ', '.join(o.long for o in similar)))
    elif len(similar) < 1:
        argcount = 1 if eq == '=' else 0
        o = Option(None, long, argcount)
        options.append(o)
        if tokens.error is DocoptExit:
            o = Option(None, long, argcount, value if argcount else True)
    else:
        o = Option(similar[0].short, similar[0].long,
                   similar[0].argcount, similar[0].value)
        if o.argcount == 0:
            if value is not None:
                raise tokens.error('%s must not have an argument' % o.long)
        else:
            if value is None:
                if tokens.current() in [None, '--']:
                    raise tokens.error('%s requires argument' % o.long)
                value = tokens.move()
        if tokens.error is DocoptExit:
            o.value = value if value is not None else True
    return [o]

"""shorts ::= '-' ( chars )* [ [ ' ' ] chars ] ;"""
    token = tokens.move()
    assert token.startswith('-') and not token.startswith('--')
    left = token.lstrip('-')
    parsed = []
    while left != '':
        short, left = '-' + left[0], left[1:]
        similar = [o for o in options if o.short == short]
        if len(similar) > 1:
            raise tokens.error('%s is specified ambiguously %d times' %
                               (short, len(similar)))
        elif len(similar) < 1:
            o = Option(short, None, 0)
            options.append(o)
            if tokens.error is DocoptExit:
                o = Option(short, None, 0, True)
        else:  # why copying is necessary here?
            o = Option(short, similar[0].long,
                       similar[0].argcount, similar[0].value)
            value = None
            if o.argcount != 0:
                if left == '':
                    if tokens.current() in [None, '--']:
                        raise tokens.error('%s requires argument' % short)
                    value = tokens.move()
                else:
                    value = left
                    left = ''
            if tokens.error is DocoptExit:
                o.value = value if value is not None else True
        parsed.append(o)
    return parsed