How to use the docopt.OneOrMore function in docopt

Example: ((-a | -b) (-c | -d)) => (-a -c | -a -d | -b -c | -b -d)
    Quirks: [-a] => (-a), (-a...) => (-a -a)

    """
    result = []
    groups = [[pattern]]
    while groups:
        children = groups.pop(0)
        parents = [Required, Optional, OptionsShortcut, Either, OneOrMore]
        if any(t in map(type, children) for t in parents):
            child = [c for c in children if type(c) in parents][0]
            children.remove(child)
            if type(child) is Either:
                for c in child.children:
                    groups.append([c] + children)
            elif type(child) is OneOrMore:
                groups.append(child.children * 2 + children)
            else:
                groups.append(child.children + children)
        else:
            result.append(children)
    return Either(*[Required(*e) for e in result])

def parse_seq(tokens, options):
    """seq ::= ( atom [ '...' ] )* ;"""
    result = []
    while tokens.current() not in [None, ']', ')', '|']:
        atom = parse_atom(tokens, options)
        if tokens.current() == '...':
            atom = [OneOrMore(*atom)]
            tokens.move()
        result += atom
    return result

def parse_seq(tokens, options):
    """seq ::= ( atom [ '...' ] )* ;"""
    result = []
    while tokens.current() not in [None, ']', ')', '|']:
        atom = parse_atom(tokens, options)
        if tokens.current() == '...':
            atom = [OneOrMore(*atom)]
            tokens.move()
        result += atom
    return result

Example: ((-a | -b) (-c | -d)) => (-a -c | -a -d | -b -c | -b -d)
    Quirks: [-a] => (-a), (-a...) => (-a -a)

    """
    result = []
    groups = [[pattern]]
    while groups:
        children = groups.pop(0)
        parents = [Required, Optional, OptionsShortcut, Either, OneOrMore]
        if any(t in map(type, children) for t in parents):
            child = [c for c in children if type(c) in parents][0]
            children.remove(child)
            if type(child) is Either:
                for c in child.children:
                    groups.append([c] + children)
            elif type(child) is OneOrMore:
                groups.append(child.children * 2 + children)
            else:
                groups.append(child.children + children)
        else:
            result.append(children)
    return Either(*[Required(*e) for e in result])

def build_command_tree(pattern, cmd_params):
    """
    Recursively fill in a command tree in cmd_params according to a docopt-parsed "pattern" object.
    """
    from docopt import Either, Optional, OneOrMore, Required, Option, Command, Argument
    if type(pattern) in [Either, Optional, OneOrMore]:
        for child in pattern.children:
            build_command_tree(child, cmd_params)
    elif type(pattern) in [Required]:
        for child in pattern.children:
            cmd_params = build_command_tree(child, cmd_params)
    elif type(pattern) in [Option]:
        suffix = "=" if pattern.argcount else ""
        if pattern.short:
            cmd_params.options.append(pattern.short + suffix)
        if pattern.long:
            cmd_params.options.append(pattern.long + suffix)
    elif type(pattern) in [Command]:
        cmd_params = cmd_params.get_subcommand(pattern.name)
    elif type(pattern) in [Argument]:
        cmd_params.arguments.append(pattern.name)
    return cmd_params