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Name	Size	Permission	Date
ConfigArgParse-1.7.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
DistUpgrade	[ DIR ]	drwxr-xr-x	2026-02-08 03:05
HweSupportStatus	[ DIR ]	drwxr-xr-x	2025-11-01 13:54
NvidiaDetector	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
OpenSSL	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
PyICU-2.12.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:54
PyJWT-2.7.0.dist-info	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
PyYAML-6.0.1.dist-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:54
Quirks	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
UbuntuDrivers	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
UpdateManager	[ DIR ]	drwxr-xr-x	2025-11-01 13:54
__pycache__	[ DIR ]	drwxr-xr-x	2026-07-29 12:52
_yaml	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
acme	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
acme-2.9.0.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
apport	[ DIR ]	drwxr-xr-x	2026-07-29 12:52
apt	[ DIR ]	drwxr-xr-x	2026-02-08 03:05
apt_inst-stubs	[ DIR ]	drwxr-xr-x	2026-02-08 03:04
apt_pkg-stubs	[ DIR ]	drwxr-xr-x	2026-02-08 03:04
aptdaemon	[ DIR ]	drwxr-xr-x	2024-07-10 10:59
aptsources	[ DIR ]	drwxr-xr-x	2026-02-08 03:05
attr	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
attrs	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
attrs-23.2.0.dist-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
blinker	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
blinker-1.7.0.dist-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
cached_property-1.5.2.egg-info	[ DIR ]	drwxr-xr-x	2022-10-05 19:21
certbot	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
certbot-2.9.0.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
certbot_apache	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
certbot_apache-2.9.0.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
certifi	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
certifi-2023.11.17.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
chardet	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
chardet-5.2.0.dist-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
click	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
click-8.1.6.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
colorama	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
colorama-0.4.6.dist-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
compose	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
configobj	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
configobj-5.0.8.dist-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
cryptography	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
cryptography-41.0.7.dist-info	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
cryptography.egg-info	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
dateutil	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
dbus	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
dbus_python-1.3.2.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:54
debian	[ DIR ]	drwxr-xr-x	2023-12-23 20:14
debian_bundle	[ DIR ]	drwxr-xr-x	2024-07-10 10:59
defer	[ DIR ]	drwxr-xr-x	2024-02-07 14:37
defer-1.0.6.egg-info	[ DIR ]	drwxr-xr-x	2022-10-05 19:18
distro	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
distro-1.9.0.dist-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
distro_info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
distro_info-1.7+build1.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
docker	[ DIR ]	drwxr-xr-x	2025-11-01 13:54
docker-5.0.3.egg-info	[ DIR ]	drwxr-xr-x	2025-11-01 13:54
docker_compose-1.29.2.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:54
dockerpty	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
dockerpty-0.4.1.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
docopt-0.6.2.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
dotenv	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
gi	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
gyp	[ DIR ]	drwxr-xr-x	2024-07-10 10:59
gyp-0.1.egg-info	[ DIR ]	drwxr-xr-x	2023-12-23 20:11
httplib2	[ DIR ]	drwxr-xr-x	2026-07-29 12:52
httplib2-0.20.4.dist-info	[ DIR ]	drwxr-xr-x	2026-07-29 12:52
icu	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
idna	[ DIR ]	drwxr-xr-x	2026-07-29 12:52
idna-3.6.dist-info	[ DIR ]	drwxr-xr-x	2026-07-29 12:52
importlib_metadata	[ DIR ]	drwxr-xr-x	2024-07-10 10:59
importlib_metadata-4.12.0.dist-info	[ DIR ]	drwxr-xr-x	2023-12-23 20:11
janitor	[ DIR ]	drwxr-xr-x	2025-11-01 13:54
josepy	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
josepy-1.14.0.dist-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
jsonpointer-2.0.egg-info	[ DIR ]	drwxr-xr-x	2024-07-09 21:58
jsonschema	[ DIR ]	drwxr-xr-x	2024-07-10 10:59
jsonschema-4.10.3.dist-info	[ DIR ]	drwxr-xr-x	2024-07-09 21:58
jwt	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
launchpadlib	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
launchpadlib-1.11.0.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
lazr	[ DIR ]	drwxr-xr-x	2022-02-01 14:54
lazr.restfulclient-0.14.6.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
lazr.uri-1.0.6.egg-info	[ DIR ]	drwxr-xr-x	2023-12-23 20:11
more_itertools	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
more_itertools-10.2.0.dist-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
oauthlib	[ DIR ]	drwxr-xr-x	2024-07-10 10:59
oauthlib-3.2.2.egg-info	[ DIR ]	drwxr-xr-x	2023-12-23 20:11
packaging	[ DIR ]	drwxr-xr-x	2025-11-01 13:54
packaging-24.0.dist-info	[ DIR ]	drwxr-xr-x	2025-11-01 13:54
parsedatetime	[ DIR ]	drwxr-xr-x	2024-07-10 16:57
parsedatetime-2.6.egg-info	[ DIR ]	drwxr-xr-x	2023-12-23 20:12
pkg_resources	[ DIR ]	drwxr-xr-x	2025-11-01 13:54
ply	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
ply-3.11.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
pyOpenSSL-23.2.0.egg-info	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
pyRFC3339-1.1.egg-info	[ DIR ]	drwxr-xr-x	2023-12-23 20:12
pygtkcompat	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
pyparsing	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
pyparsing-3.1.1.dist-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
pyrfc3339	[ DIR ]	drwxr-xr-x	2024-07-10 16:57
pyrsistent	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
pyrsistent-0.20.0.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:54
python_apt-2.7.7+ubuntu5.2.egg-info	[ DIR ]	drwxr-xr-x	2026-02-08 03:04
python_dateutil-2.8.2.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
python_debian-0.1.49+ubuntu2.egg-info	[ DIR ]	drwxr-xr-x	2023-12-23 20:11
python_dotenv-1.0.1.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
pytz	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
pytz-2024.1.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
requests	[ DIR ]	drwxr-xr-x	2025-11-01 13:54
requests-2.31.0.egg-info	[ DIR ]	drwxr-xr-x	2025-11-01 13:53
six-1.16.0.egg-info	[ DIR ]	drwxr-xr-x	2023-12-23 20:11
softwareproperties	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
systemd	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
systemd_python-235.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:54
texttable-1.6.7.egg-info	[ DIR ]	drwxr-xr-x	2023-12-23 20:11
uaclient	[ DIR ]	drwxr-xr-x	2026-07-29 12:52
ubuntu_drivers_common-0.0.0.egg-info	[ DIR ]	drwxr-xr-x	2026-04-26 19:49
ubuntu_pro_client-8001.egg-info	[ DIR ]	drwxr-xr-x	2026-07-29 12:52
unattended_upgrades-0.1.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
urllib3	[ DIR ]	drwxr-xr-x	2026-07-29 12:52
urllib3-2.0.7.dist-info	[ DIR ]	drwxr-xr-x	2026-07-29 12:52
validate	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
wadllib	[ DIR ]	drwxr-xr-x	2024-07-10 10:59
wadllib-1.3.6.egg-info	[ DIR ]	drwxr-xr-x	2024-07-09 21:58
websocket	[ DIR ]	drwxr-xr-x	2024-07-10 10:56
websocket_client-1.7.0.egg-info	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
xkit	[ DIR ]	drwxr-xr-x	2024-07-10 10:59
yaml	[ DIR ]	drwxr-xr-x	2024-07-10 10:57
zipp-1.0.0.dist-info	[ DIR ]	drwxr-xr-x	2024-07-26 14:20
PyGObject-3.48.2.egg-info	851 B	-rw-r--r--	2024-04-06 10:49
_cffi_backend.cpython-312-x86_64-linux-gnu.so	189.95 KB	-rw-r--r--	2024-04-08 16:16
_dbus_bindings.cpython-312-x86_64-linux-gnu.so	168.28 KB	-rw-r--r--	2024-03-31 00:50
_dbus_glib_bindings.cpython-312-x86_64-linux-gnu.so	22.5 KB	-rw-r--r--	2024-03-31 00:50
_pyrsistent_version.py	23 B	-rw-r--r--	2023-10-25 20:54
apport_python_hook.py	8.49 KB	-rw-r--r--	2026-04-24 11:18
apt_inst.cpython-312-x86_64-linux-gnu.so	58.66 KB	-rw-r--r--	2026-01-19 10:38
apt_pkg.cpython-312-x86_64-linux-gnu.so	339.19 KB	-rw-r--r--	2026-01-19 10:38
augeas.py	23 KB	-rw-r--r--	2014-08-31 17:18
cached_property.py	4.22 KB	-rw-r--r--	2020-09-21 18:25
configargparse.py	63.09 KB	-rw-r--r--	2023-07-23 14:36
deb822.py	273 B	-rw-r--r--	2023-01-31 19:04
debconf.py	7.87 KB	-rw-r--r--	2024-04-12 12:40
distro_info.py	14.26 KB	-rw-r--r--	2023-10-29 08:46
docopt.py	19.48 KB	-rw-r--r--	2024-02-27 09:20
jsonpointer.py	9.57 KB	-rw-r--r--	2018-01-16 15:18
problem_report.py	33.27 KB	-rw-r--r--	2026-04-24 11:18
pvectorc.cpython-312-x86_64-linux-gnu.so	36.65 KB	-rw-r--r--	2024-03-31 17:03
python_augeas-0.5.0.egg-info	238 B	-rw-r--r--	2019-10-17 02:17
six.py	33.74 KB	-rw-r--r--	2021-05-05 14:17
texttable.py	22.08 KB	-rw-r--r--	2022-11-23 07:16
xkit-0.0.0.egg-info	266 B	-rw-r--r--	2022-12-31 08:32
zipp.py	6.75 KB	-rw-r--r--	2024-07-21 04:00

Rename

"""Pythonic command-line interface parser that will make you smile.

* http://docopt.org
 * Repository and issue-tracker: https://github.com/docopt/docopt
 * Licensed under terms of MIT license (see LICENSE-MIT)
 * Copyright (c) 2013 Vladimir Keleshev, vladimir@keleshev.com

"""
import sys
import re

__all__ = ['docopt']
__version__ = '0.6.2'

class DocoptLanguageError(Exception):

"""Error in construction of usage-message by developer."""

class DocoptExit(SystemExit):

"""Exit in case user invoked program with incorrect arguments."""

usage = ''

def __init__(self, message=''):
        SystemExit.__init__(self, (message + '\n' + self.usage).strip())

class Pattern(object):

def __eq__(self, other):
        return repr(self) == repr(other)

def __hash__(self):
        return hash(repr(self))

def fix(self):
        self.fix_identities()
        self.fix_repeating_arguments()
        return self

def fix_identities(self, uniq=None):
        """Make pattern-tree tips point to same object if they are equal."""
        if not hasattr(self, 'children'):
            return self
        uniq = list(set(self.flat())) if uniq is None else uniq
        for i, c in enumerate(self.children):
            if not hasattr(c, 'children'):
                assert c in uniq
                self.children[i] = uniq[uniq.index(c)]
            else:
                c.fix_identities(uniq)

def fix_repeating_arguments(self):
        """Fix elements that should accumulate/increment values."""
        either = [list(c.children) for c in self.either.children]
        for case in either:
            for e in [c for c in case if case.count(c) > 1]:
                if type(e) is Argument or type(e) is Option and e.argcount:
                    if e.value is None:
                        e.value = []
                    elif type(e.value) is not list:
                        e.value = e.value.split()
                if type(e) is Command or type(e) is Option and e.argcount == 0:
                    e.value = 0
        return self

@property
    def either(self):
        """Transform pattern into an equivalent, with only top-level Either."""
        # Currently the pattern will not be equivalent, but more "narrow",
        # although good enough to reason about list arguments.
        ret = []
        groups = [[self]]
        while groups:
            children = groups.pop(0)
            types = [type(c) for c in children]
            if Either in types:
                either = [c for c in children if type(c) is Either][0]
                children.pop(children.index(either))
                for c in either.children:
                    groups.append([c] + children)
            elif Required in types:
                required = [c for c in children if type(c) is Required][0]
                children.pop(children.index(required))
                groups.append(list(required.children) + children)
            elif Optional in types:
                optional = [c for c in children if type(c) is Optional][0]
                children.pop(children.index(optional))
                groups.append(list(optional.children) + children)
            elif AnyOptions in types:
                optional = [c for c in children if type(c) is AnyOptions][0]
                children.pop(children.index(optional))
                groups.append(list(optional.children) + children)
            elif OneOrMore in types:
                oneormore = [c for c in children if type(c) is OneOrMore][0]
                children.pop(children.index(oneormore))
                groups.append(list(oneormore.children) * 2 + children)
            else:
                ret.append(children)
        return Either(*[Required(*e) for e in ret])

class ChildPattern(Pattern):

def __init__(self, name, value=None):
        self.name = name
        self.value = value

def __repr__(self):
        return '%s(%r, %r)' % (self.__class__.__name__, self.name, self.value)

def flat(self, *types):
        return [self] if not types or type(self) in types else []

def match(self, left, collected=None):
        collected = [] if collected is None else collected
        pos, match = self.single_match(left)
        if match is None:
            return False, left, collected
        left_ = left[:pos] + left[pos + 1:]
        same_name = [a for a in collected if a.name == self.name]
        if type(self.value) in (int, list):
            if type(self.value) is int:
                increment = 1
            else:
                increment = ([match.value] if type(match.value) is str
                             else match.value)
            if not same_name:
                match.value = increment
                return True, left_, collected + [match]
            same_name[0].value += increment
            return True, left_, collected
        return True, left_, collected + [match]

class ParentPattern(Pattern):

def __init__(self, *children):
        self.children = list(children)

def __repr__(self):
        return '%s(%s)' % (self.__class__.__name__,
                           ', '.join(repr(a) for a in self.children))

def flat(self, *types):
        if type(self) in types:
            return [self]
        return sum([c.flat(*types) for c in self.children], [])

class Argument(ChildPattern):

def single_match(self, left):
        for n, p in enumerate(left):
            if type(p) is Argument:
                return n, Argument(self.name, p.value)
        return None, None

@classmethod
    def parse(class_, source):
        name = re.findall(r'(<\S*?>)', source)[0]
        value = re.findall(r'\[default: (.*)\]', source, flags=re.I)
        return class_(name, value[0] if value else None)

class Command(Argument):

def __init__(self, name, value=False):
        self.name = name
        self.value = value

def single_match(self, left):
        for n, p in enumerate(left):
            if type(p) is Argument:
                if p.value == self.name:
                    return n, Command(self.name, True)
                else:
                    break
        return None, None

class Option(ChildPattern):

def __init__(self, short=None, long=None, argcount=0, value=False):
        assert argcount in (0, 1)
        self.short, self.long = short, long
        self.argcount, self.value = argcount, value
        self.value = None if value is False and argcount else value

@classmethod
    def parse(class_, option_description):
        short, long, argcount, value = None, None, 0, False
        options, _, description = option_description.strip().partition('  ')
        options = options.replace(',', ' ').replace('=', ' ')
        for s in options.split():
            if s.startswith('--'):
                long = s
            elif s.startswith('-'):
                short = s
            else:
                argcount = 1
        if argcount:
            matched = re.findall(r'\[default: (.*)\]', description, flags=re.I)
            value = matched[0] if matched else None
        return class_(short, long, argcount, value)

def single_match(self, left):
        for n, p in enumerate(left):
            if self.name == p.name:
                return n, p
        return None, None

@property
    def name(self):
        return self.long or self.short

def __repr__(self):
        return 'Option(%r, %r, %r, %r)' % (self.short, self.long,
                                           self.argcount, self.value)

class Required(ParentPattern):

def match(self, left, collected=None):
        collected = [] if collected is None else collected
        l = left
        c = collected
        for p in self.children:
            matched, l, c = p.match(l, c)
            if not matched:
                return False, left, collected
        return True, l, c

class Optional(ParentPattern):

def match(self, left, collected=None):
        collected = [] if collected is None else collected
        for p in self.children:
            m, left, collected = p.match(left, collected)
        return True, left, collected

class AnyOptions(Optional):

"""Marker/placeholder for [options] shortcut."""

class OneOrMore(ParentPattern):

def match(self, left, collected=None):
        assert len(self.children) == 1
        collected = [] if collected is None else collected
        l = left
        c = collected
        l_ = None
        matched = True
        times = 0
        while matched:
            # could it be that something didn't match but changed l or c?
            matched, l, c = self.children[0].match(l, c)
            times += 1 if matched else 0
            if l_ == l:
                break
            l_ = l
        if times >= 1:
            return True, l, c
        return False, left, collected

class Either(ParentPattern):

def match(self, left, collected=None):
        collected = [] if collected is None else collected
        outcomes = []
        for p in self.children:
            matched, _, _ = outcome = p.match(left, collected)
            if matched:
                outcomes.append(outcome)
        if outcomes:
            return min(outcomes, key=lambda outcome: len(outcome[1]))
        return False, left, collected

class TokenStream(list):

def __init__(self, source, error):
        self += source.split() if hasattr(source, 'split') else source
        self.error = error

def move(self):
        return self.pop(0) if len(self) else None

def current(self):
        return self[0] if len(self) else None

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() is 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_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() is 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

def parse_pattern(source, options):
    tokens = TokenStream(re.sub(r'([\[\]\(\)\|]|\.\.\.)', r' \1 ', source),
                         DocoptLanguageError)
    result = parse_expr(tokens, options)
    if tokens.current() is not None:
        raise tokens.error('unexpected ending: %r' % ' '.join(tokens))
    return Required(*result)

def parse_expr(tokens, options):
    """expr ::= seq ( '|' seq )* ;"""
    seq = parse_seq(tokens, options)
    if tokens.current() != '|':
        return seq
    result = [Required(*seq)] if len(seq) > 1 else seq
    while tokens.current() == '|':
        tokens.move()
        seq = parse_seq(tokens, options)
        result += [Required(*seq)] if len(seq) > 1 else seq
    return [Either(*result)] if len(result) > 1 else 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_atom(tokens, options):
    """atom ::= '(' expr ')' | '[' expr ']' | 'options'
             | long | shorts | argument | command ;
    """
    token = tokens.current()
    result = []
    if token in '([':
        tokens.move()
        matching, pattern = {'(': [')', Required], '[': [']', Optional]}[token]
        result = pattern(*parse_expr(tokens, options))
        if tokens.move() != matching:
            raise tokens.error("unmatched '%s'" % token)
        return [result]
    elif token == 'options':
        tokens.move()
        return [AnyOptions()]
    elif token.startswith('--') and token != '--':
        return parse_long(tokens, options)
    elif token.startswith('-') and token not in ('-', '--'):
        return parse_shorts(tokens, options)
    elif token.startswith('<') and token.endswith('>') or token.isupper():
        return [Argument(tokens.move())]
    else:
        return [Command(tokens.move())]

def parse_argv(tokens, options, options_first=False):
    """Parse command-line argument vector.

If options_first:
        argv ::= [ long | shorts ]* [ argument ]* [ '--' [ argument ]* ] ;
    else:
        argv ::= [ long | shorts | argument ]* [ '--' [ argument ]* ] ;

"""
    parsed = []
    while tokens.current() is not None:
        if tokens.current() == '--':
            return parsed + [Argument(None, v) for v in tokens]
        elif tokens.current().startswith('--'):
            parsed += parse_long(tokens, options)
        elif tokens.current().startswith('-') and tokens.current() != '-':
            parsed += parse_shorts(tokens, options)
        elif options_first:
            return parsed + [Argument(None, v) for v in tokens]
        else:
            parsed.append(Argument(None, tokens.move()))
    return parsed

def parse_defaults(doc):
    # in python < 2.7 you can't pass flags=re.MULTILINE
    split = re.split(r'\n *(<\S+?>|-\S+?)', doc)[1:]
    split = [s1 + s2 for s1, s2 in zip(split[::2], split[1::2])]
    options = [Option.parse(s) for s in split if s.startswith('-')]
    #arguments = [Argument.parse(s) for s in split if s.startswith('<')]
    #return options, arguments
    return options

def printable_usage(doc):
    # in python < 2.7 you can't pass flags=re.IGNORECASE
    usage_split = re.split(r'([Uu][Ss][Aa][Gg][Ee]:)', doc)
    if len(usage_split) < 3:
        raise DocoptLanguageError('"usage:" (case-insensitive) not found.')
    if len(usage_split) > 3:
        raise DocoptLanguageError('More than one "usage:" (case-insensitive).')
    return re.split(r'\n\s*\n', ''.join(usage_split[1:]))[0].strip()

def formal_usage(printable_usage):
    pu = printable_usage.split()[1:]  # split and drop "usage:"
    return '( ' + ' '.join(') | (' if s == pu[0] else s for s in pu[1:]) + ' )'

def extras(help, version, options, doc):
    if help and any((o.name in ('-h', '--help')) and o.value for o in options):
        print(doc.strip("\n"))
        sys.exit()
    if version and any(o.name == '--version' and o.value for o in options):
        print(version)
        sys.exit()

class Dict(dict):
    def __repr__(self):
        return '{%s}' % ',\n '.join('%r: %r' % i for i in sorted(self.items()))

def docopt(doc, argv=None, help=True, version=None, options_first=False):
    """Parse `argv` based on command-line interface described in `doc`.

`docopt` creates your command-line interface based on its
    description that you pass as `doc`. Such description can contain
    --options, <positional-argument>, commands, which could be
    [optional], (required), (mutually | exclusive) or repeated...

Parameters
    ----------
    doc : str
        Description of your command-line interface.
    argv : list of str, optional
        Argument vector to be parsed. sys.argv[1:] is used if not
        provided.
    help : bool (default: True)
        Set to False to disable automatic help on -h or --help
        options.
    version : any object
        If passed, the object will be printed if --version is in
        `argv`.
    options_first : bool (default: False)
        Set to True to require options preceed positional arguments,
        i.e. to forbid options and positional arguments intermix.

Returns
    -------
    args : dict
        A dictionary, where keys are names of command-line elements
        such as e.g. "--verbose" and "<path>", and values are the
        parsed values of those elements.

Example
    -------
    >>> from docopt import docopt
    >>> doc = '''
    Usage:
        my_program tcp <host> <port> [--timeout=<seconds>]
        my_program serial <port> [--baud=<n>] [--timeout=<seconds>]
        my_program (-h | --help | --version)

Options:
        -h, --help  Show this screen and exit.
        --baud=<n>  Baudrate [default: 9600]
    '''
    >>> argv = ['tcp', '127.0.0.1', '80', '--timeout', '30']
    >>> docopt(doc, argv)
    {'--baud': '9600',
     '--help': False,
     '--timeout': '30',
     '--version': False,
     '<host>': '127.0.0.1',
     '<port>': '80',
     'serial': False,
     'tcp': True}

See also
    --------
    * For video introduction see http://docopt.org
    * Full documentation is available in README.rst as well as online
      at https://github.com/docopt/docopt#readme

"""
    if argv is None:
        argv = sys.argv[1:]
    DocoptExit.usage = printable_usage(doc)
    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(TokenStream(argv, DocoptExit), list(options),
                      options_first)
    pattern_options = set(pattern.flat(Option))
    for ao in pattern.flat(AnyOptions):
        doc_options = parse_defaults(doc)
        ao.children = list(set(doc_options) - pattern_options)
        #if any_options:
        #    ao.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()