FM / python3.7

/opt/alt/python37/lib64/python3.7

Name	Size	Mode	Actions
asyncio/	-	0755	rm
collections/	-	0755	rm
concurrent/	-	0755	rm
config-3.7m/	-	0755	rm
ctypes/	-	0755	rm
curses/	-	0755	rm
dbm/	-	0755	rm
distutils/	-	0755	rm
email/	-	0755	rm
encodings/	-	0755	rm
ensurepip/	-	0755	rm
html/	-	0755	rm
http/	-	0755	rm
idlelib/	-	0755	rm
importlib/	-	0755	rm
json/	-	0755	rm
lib-dynload/	-	0755	rm
lib2to3/	-	0755	rm
logging/	-	0755	rm
multiprocessing/	-	0755	rm
pydoc_data/	-	0755	rm
site-packages/	-	0755	rm
sqlite3/	-	0755	rm
test/	-	0755	rm
unittest/	-	0755	rm
urllib/	-	0755	rm
venv/	-	0755	rm
wsgiref/	-	0755	rm
xml/	-	0755	rm
xmlrpc/	-	0755	rm
__pycache__/	-	0755	rm
abc.py	5580	0644	edit dl rm
aifc.py	32814	0644	edit dl rm
antigravity.py	477	0644	edit dl rm
argparse.py	95372	0644	edit dl rm
ast.py	12842	0644	edit dl rm
asynchat.py	11328	0644	edit dl rm
asyncore.py	20118	0644	edit dl rm
base64.py	20393	0755	edit dl rm
bdb.py	31730	0644	edit dl rm
binhex.py	13954	0644	edit dl rm
bisect.py	2557	0644	edit dl rm
bz2.py	12410	0644	edit dl rm
calendar.py	24826	0644	edit dl rm
cgi.py	35050	0755	edit dl rm
cgitb.py	12018	0644	edit dl rm
chunk.py	5435	0644	edit dl rm
cmd.py	14860	0644	edit dl rm
code.py	10622	0644	edit dl rm
codecs.py	36615	0644	edit dl rm
codeop.py	6275	0644	edit dl rm
colorsys.py	4064	0644	edit dl rm
compileall.py	13788	0644	edit dl rm
configparser.py	54283	0644	edit dl rm
contextlib.py	24763	0644	edit dl rm
contextvars.py	129	0644	edit dl rm
copy.py	8856	0644	edit dl rm
copyreg.py	7017	0644	edit dl rm
cProfile.py	6253	0755	edit dl rm
crypt.py	3346	0644	edit dl rm
csv.py	16180	0644	edit dl rm
dataclasses.py	49520	0644	edit dl rm
datetime.py	86544	0644	edit dl rm
decimal.py	320	0644	edit dl rm
difflib.py	84393	0644	edit dl rm
dis.py	19888	0644	edit dl rm
doctest.py	104560	0644	edit dl rm
dummy_threading.py	2815	0644	edit dl rm
enum.py	35043	0644	edit dl rm
filecmp.py	9830	0644	edit dl rm
fileinput.py	14625	0644	edit dl rm
fnmatch.py	4056	0644	edit dl rm
formatter.py	15143	0644	edit dl rm
fractions.py	23752	0644	edit dl rm
ftplib.py	35618	0644	edit dl rm
functools.py	32932	0644	edit dl rm
genericpath.py	4912	0644	edit dl rm
getopt.py	7489	0644	edit dl rm
getpass.py	5994	0644	edit dl rm
gettext.py	21967	0644	edit dl rm
glob.py	5638	0644	edit dl rm
gzip.py	20637	0644	edit dl rm
hashlib.py	9534	0644	edit dl rm
heapq.py	23017	0644	edit dl rm
hmac.py	6517	0644	edit dl rm
imaplib.py	53292	0644	edit dl rm
imghdr.py	3795	0644	edit dl rm
imp.py	10536	0644	edit dl rm
inspect.py	117635	0644	edit dl rm
io.py	3517	0644	edit dl rm
ipaddress.py	73578	0644	edit dl rm
keyword.py	2256	0755	edit dl rm
linecache.py	5330	0644	edit dl rm
locale.py	78191	0644	edit dl rm
lzma.py	12983	0644	edit dl rm
macpath.py	6123	0644	edit dl rm
mailbox.py	78654	0644	edit dl rm
mailcap.py	9067	0644	edit dl rm
mimetypes.py	21496	0644	edit dl rm
modulefinder.py	23035	0644	edit dl rm
netrc.py	5566	0644	edit dl rm
nntplib.py	43087	0644	edit dl rm
ntpath.py	22340	0644	edit dl rm
nturl2path.py	2584	0644	edit dl rm
numbers.py	10244	0644	edit dl rm
opcode.py	5824	0644	edit dl rm
operator.py	10863	0644	edit dl rm
optparse.py	60371	0644	edit dl rm
os.py	37901	0644	edit dl rm
pathlib.py	50329	0644	edit dl rm
pdb.py	62505	0755	edit dl rm
pickle.py	57994	0644	edit dl rm
pickletools.py	91220	0644	edit dl rm
pipes.py	8916	0644	edit dl rm
pkgutil.py	21461	0644	edit dl rm
platform.py	46994	0755	edit dl rm
plistlib.py	30709	0644	edit dl rm
poplib.py	14964	0644	edit dl rm
posixpath.py	15771	0644	edit dl rm
pprint.py	20884	0644	edit dl rm
profile.py	22494	0755	edit dl rm
pstats.py	27315	0644	edit dl rm
pty.py	4763	0644	edit dl rm
pyclbr.py	15137	0644	edit dl rm
pydoc.py	105876	0644	edit dl rm
py_compile.py	8001	0644	edit dl rm
queue.py	11359	0644	edit dl rm
quopri.py	7265	0755	edit dl rm
random.py	27557	0644	edit dl rm
re.py	15306	0644	edit dl rm
reprlib.py	5267	0644	edit dl rm
rlcompleter.py	7097	0644	edit dl rm
runpy.py	11959	0644	edit dl rm
sched.py	6442	0644	edit dl rm
secrets.py	2038	0644	edit dl rm
selectors.py	18561	0644	edit dl rm
shelve.py	8527	0644	edit dl rm
shlex.py	13100	0644	edit dl rm
shutil.py	41950	0644	edit dl rm
signal.py	2123	0644	edit dl rm
site.py	21575	0644	edit dl rm
smtpd.py	34722	0755	edit dl rm
smtplib.py	44443	0755	edit dl rm
sndhdr.py	7086	0644	edit dl rm
socket.py	27469	0644	edit dl rm
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sre_compile.py	26872	0644	edit dl rm
sre_constants.py	7177	0644	edit dl rm
sre_parse.py	39156	0644	edit dl rm
ssl.py	45495	0644	edit dl rm
stat.py	5391	0644	edit dl rm
statistics.py	20651	0644	edit dl rm
string.py	11564	0644	edit dl rm
stringprep.py	12917	0644	edit dl rm
struct.py	257	0644	edit dl rm
subprocess.py	72649	0644	edit dl rm
sunau.py	18375	0644	edit dl rm
symbol.py	2142	0755	edit dl rm
symtable.py	7279	0644	edit dl rm
sysconfig.py	24440	0644	edit dl rm
tabnanny.py	11419	0755	edit dl rm
tarfile.py	92675	0755	edit dl rm
telnetlib.py	23135	0644	edit dl rm
tempfile.py	26730	0644	edit dl rm
textwrap.py	19407	0644	edit dl rm
this.py	1003	0644	edit dl rm
threading.py	49284	0644	edit dl rm
timeit.py	13493	0755	edit dl rm
token.py	3763	0644	edit dl rm
tokenize.py	27031	0644	edit dl rm
trace.py	28903	0755	edit dl rm
traceback.py	23437	0644	edit dl rm
tracemalloc.py	17076	0644	edit dl rm
tty.py	879	0644	edit dl rm
types.py	9897	0644	edit dl rm
typing.py	56438	0644	edit dl rm
uu.py	7277	0644	edit dl rm
uuid.py	29518	0644	edit dl rm
warnings.py	20080	0644	edit dl rm
wave.py	18230	0644	edit dl rm
weakref.py	21508	0644	edit dl rm
webbrowser.py	23715	0755	edit dl rm
xdrlib.py	5913	0644	edit dl rm
zipapp.py	7535	0644	edit dl rm
zipfile.py	81094	0644	edit dl rm
_bootlocale.py	1801	0644	edit dl rm
_collections_abc.py	26424	0644	edit dl rm
_compat_pickle.py	8749	0644	edit dl rm
_compression.py	5340	0644	edit dl rm
_dummy_thread.py	6027	0644	edit dl rm
_markupbase.py	14598	0644	edit dl rm
_osx_support.py	19600	0644	edit dl rm
_pydecimal.py	228690	0644	edit dl rm
_pyio.py	91616	0644	edit dl rm
_py_abc.py	6186	0644	edit dl rm
_sitebuiltins.py	3115	0644	edit dl rm
_strptime.py	25504	0644	edit dl rm
_sysconfigdata_dm_linux_x86_64-linux-gnu.py	29786	0644	edit dl rm
_sysconfigdata_m_linux_x86_64-linux-gnu.py	28651	0644	edit dl rm
_threading_local.py	7214	0644	edit dl rm
_weakrefset.py	5679	0644	edit dl rm
__future__.py	5101	0644	edit dl rm
__phello__.foo.py	64	0644	edit dl rm

Edit: /opt/alt/python37/lib64/python3.7/ntpath.py (22340B)

# Module 'ntpath' -- common operations on WinNT/Win95 pathnames
"""Common pathname manipulations, WindowsNT/95 version.

Instead of importing this module directly, import os and refer to this
module as os.path.
"""

# strings representing various path-related bits and pieces
# These are primarily for export; internally, they are hardcoded.
# Should be set before imports for resolving cyclic dependency.
curdir = '.'
pardir = '..'
extsep = '.'
sep = '\\'
pathsep = ';'
altsep = '/'
defpath = '.;C:\\bin'
devnull = 'nul'

import os
import sys
import stat
import genericpath
from genericpath import *

__all__ = ["normcase","isabs","join","splitdrive","split","splitext",
           "basename","dirname","commonprefix","getsize","getmtime",
           "getatime","getctime", "islink","exists","lexists","isdir","isfile",
           "ismount", "expanduser","expandvars","normpath","abspath",
           "curdir","pardir","sep","pathsep","defpath","altsep",
           "extsep","devnull","realpath","supports_unicode_filenames","relpath",
           "samefile", "sameopenfile", "samestat", "commonpath"]

def _get_bothseps(path):
    if isinstance(path, bytes):
        return b'\\/'
    else:
        return '\\/'

# Normalize the case of a pathname and map slashes to backslashes.
# Other normalizations (such as optimizing '../' away) are not done
# (this is done by normpath).

def normcase(s):
    """Normalize case of pathname.

Makes all characters lowercase and all slashes into backslashes."""
    s = os.fspath(s)
    try:
        if isinstance(s, bytes):
            return s.replace(b'/', b'\\').lower()
        else:
            return s.replace('/', '\\').lower()
    except (TypeError, AttributeError):
        if not isinstance(s, (bytes, str)):
            raise TypeError("normcase() argument must be str or bytes, "
                            "not %r" % s.__class__.__name__) from None
        raise

# Return whether a path is absolute.
# Trivial in Posix, harder on Windows.
# For Windows it is absolute if it starts with a slash or backslash (current
# volume), or if a pathname after the volume-letter-and-colon or UNC-resource
# starts with a slash or backslash.

def isabs(s):
    """Test whether a path is absolute"""
    s = os.fspath(s)
    s = splitdrive(s)[1]
    return len(s) > 0 and s[0] in _get_bothseps(s)

# Join two (or more) paths.
def join(path, *paths):
    path = os.fspath(path)
    if isinstance(path, bytes):
        sep = b'\\'
        seps = b'\\/'
        colon = b':'
    else:
        sep = '\\'
        seps = '\\/'
        colon = ':'
    try:
        if not paths:
            path[:0] + sep  #23780: Ensure compatible data type even if p is null.
        result_drive, result_path = splitdrive(path)
        for p in map(os.fspath, paths):
            p_drive, p_path = splitdrive(p)
            if p_path and p_path[0] in seps:
                # Second path is absolute
                if p_drive or not result_drive:
                    result_drive = p_drive
                result_path = p_path
                continue
            elif p_drive and p_drive != result_drive:
                if p_drive.lower() != result_drive.lower():
                    # Different drives => ignore the first path entirely
                    result_drive = p_drive
                    result_path = p_path
                    continue
                # Same drive in different case
                result_drive = p_drive
            # Second path is relative to the first
            if result_path and result_path[-1] not in seps:
                result_path = result_path + sep
            result_path = result_path + p_path
        ## add separator between UNC and non-absolute path
        if (result_path and result_path[0] not in seps and
            result_drive and result_drive[-1:] != colon):
            return result_drive + sep + result_path
        return result_drive + result_path
    except (TypeError, AttributeError, BytesWarning):
        genericpath._check_arg_types('join', path, *paths)
        raise

# Split a path in a drive specification (a drive letter followed by a
# colon) and the path specification.
# It is always true that drivespec + pathspec == p
def splitdrive(p):
    """Split a pathname into drive/UNC sharepoint and relative path specifiers.
    Returns a 2-tuple (drive_or_unc, path); either part may be empty.

If you assign
        result = splitdrive(p)
    It is always true that:
        result[0] + result[1] == p

If the path contained a drive letter, drive_or_unc will contain everything
    up to and including the colon.  e.g. splitdrive("c:/dir") returns ("c:", "/dir")

If the path contained a UNC path, the drive_or_unc will contain the host name
    and share up to but not including the fourth directory separator character.
    e.g. splitdrive("//host/computer/dir") returns ("//host/computer", "/dir")

Paths cannot contain both a drive letter and a UNC path.

"""
    p = os.fspath(p)
    if len(p) >= 2:
        if isinstance(p, bytes):
            sep = b'\\'
            altsep = b'/'
            colon = b':'
        else:
            sep = '\\'
            altsep = '/'
            colon = ':'
        normp = p.replace(altsep, sep)
        if (normp[0:2] == sep*2) and (normp[2:3] != sep):
            # is a UNC path:
            # vvvvvvvvvvvvvvvvvvvv drive letter or UNC path
            # \\machine\mountpoint\directory\etc\...
            #           directory ^^^^^^^^^^^^^^^
            index = normp.find(sep, 2)
            if index == -1:
                return p[:0], p
            index2 = normp.find(sep, index + 1)
            # a UNC path can't have two slashes in a row
            # (after the initial two)
            if index2 == index + 1:
                return p[:0], p
            if index2 == -1:
                index2 = len(p)
            return p[:index2], p[index2:]
        if normp[1:2] == colon:
            return p[:2], p[2:]
    return p[:0], p

# Split a path in head (everything up to the last '/') and tail (the
# rest).  After the trailing '/' is stripped, the invariant
# join(head, tail) == p holds.
# The resulting head won't end in '/' unless it is the root.

def split(p):
    """Split a pathname.

Return tuple (head, tail) where tail is everything after the final slash.
    Either part may be empty."""
    p = os.fspath(p)
    seps = _get_bothseps(p)
    d, p = splitdrive(p)
    # set i to index beyond p's last slash
    i = len(p)
    while i and p[i-1] not in seps:
        i -= 1
    head, tail = p[:i], p[i:]  # now tail has no slashes
    # remove trailing slashes from head, unless it's all slashes
    head = head.rstrip(seps) or head
    return d + head, tail

# Split a path in root and extension.
# The extension is everything starting at the last dot in the last
# pathname component; the root is everything before that.
# It is always true that root + ext == p.

def splitext(p):
    p = os.fspath(p)
    if isinstance(p, bytes):
        return genericpath._splitext(p, b'\\', b'/', b'.')
    else:
        return genericpath._splitext(p, '\\', '/', '.')
splitext.__doc__ = genericpath._splitext.__doc__

# Return the tail (basename) part of a path.

def basename(p):
    """Returns the final component of a pathname"""
    return split(p)[1]

# Return the head (dirname) part of a path.

def dirname(p):
    """Returns the directory component of a pathname"""
    return split(p)[0]

# Is a path a symbolic link?
# This will always return false on systems where os.lstat doesn't exist.

def islink(path):
    """Test whether a path is a symbolic link.
    This will always return false for Windows prior to 6.0.
    """
    try:
        st = os.lstat(path)
    except (OSError, AttributeError):
        return False
    return stat.S_ISLNK(st.st_mode)

# Being true for dangling symbolic links is also useful.

def lexists(path):
    """Test whether a path exists.  Returns True for broken symbolic links"""
    try:
        st = os.lstat(path)
    except OSError:
        return False
    return True

# Is a path a mount point?
# Any drive letter root (eg c:\)
# Any share UNC (eg \\server\share)
# Any volume mounted on a filesystem folder
#
# No one method detects all three situations. Historically we've lexically
# detected drive letter roots and share UNCs. The canonical approach to
# detecting mounted volumes (querying the reparse tag) fails for the most
# common case: drive letter roots. The alternative which uses GetVolumePathName
# fails if the drive letter is the result of a SUBST.
try:
    from nt import _getvolumepathname
except ImportError:
    _getvolumepathname = None
def ismount(path):
    """Test whether a path is a mount point (a drive root, the root of a
    share, or a mounted volume)"""
    path = os.fspath(path)
    seps = _get_bothseps(path)
    path = abspath(path)
    root, rest = splitdrive(path)
    if root and root[0] in seps:
        return (not rest) or (rest in seps)
    if rest in seps:
        return True

if _getvolumepathname:
        return path.rstrip(seps) == _getvolumepathname(path).rstrip(seps)
    else:
        return False

# Expand paths beginning with '~' or '~user'.
# '~' means $HOME; '~user' means that user's home directory.
# If the path doesn't begin with '~', or if the user or $HOME is unknown,
# the path is returned unchanged (leaving error reporting to whatever
# function is called with the expanded path as argument).
# See also module 'glob' for expansion of *, ? and [...] in pathnames.
# (A function should also be defined to do full *sh-style environment
# variable expansion.)

def expanduser(path):
    """Expand ~ and ~user constructs.

If user or $HOME is unknown, do nothing."""
    path = os.fspath(path)
    if isinstance(path, bytes):
        tilde = b'~'
    else:
        tilde = '~'
    if not path.startswith(tilde):
        return path
    i, n = 1, len(path)
    while i < n and path[i] not in _get_bothseps(path):
        i += 1

if 'HOME' in os.environ:
        userhome = os.environ['HOME']
    elif 'USERPROFILE' in os.environ:
        userhome = os.environ['USERPROFILE']
    elif not 'HOMEPATH' in os.environ:
        return path
    else:
        try:
            drive = os.environ['HOMEDRIVE']
        except KeyError:
            drive = ''
        userhome = join(drive, os.environ['HOMEPATH'])

if isinstance(path, bytes):
        userhome = os.fsencode(userhome)

if i != 1: #~user
        userhome = join(dirname(userhome), path[1:i])

return userhome + path[i:]

# Expand paths containing shell variable substitutions.
# The following rules apply:
#       - no expansion within single quotes
#       - '$$' is translated into '$'
#       - '%%' is translated into '%' if '%%' are not seen in %var1%%var2%
#       - ${varname} is accepted.
#       - $varname is accepted.
#       - %varname% is accepted.
#       - varnames can be made out of letters, digits and the characters '_-'
#         (though is not verified in the ${varname} and %varname% cases)
# XXX With COMMAND.COM you can use any characters in a variable name,
# XXX except '^|<>='.

def expandvars(path):
    """Expand shell variables of the forms $var, ${var} and %var%.

Unknown variables are left unchanged."""
    path = os.fspath(path)
    if isinstance(path, bytes):
        if b'$' not in path and b'%' not in path:
            return path
        import string
        varchars = bytes(string.ascii_letters + string.digits + '_-', 'ascii')
        quote = b'\''
        percent = b'%'
        brace = b'{'
        rbrace = b'}'
        dollar = b'$'
        environ = getattr(os, 'environb', None)
    else:
        if '$' not in path and '%' not in path:
            return path
        import string
        varchars = string.ascii_letters + string.digits + '_-'
        quote = '\''
        percent = '%'
        brace = '{'
        rbrace = '}'
        dollar = '$'
        environ = os.environ
    res = path[:0]
    index = 0
    pathlen = len(path)
    while index < pathlen:
        c = path[index:index+1]
        if c == quote:   # no expansion within single quotes
            path = path[index + 1:]
            pathlen = len(path)
            try:
                index = path.index(c)
                res += c + path[:index + 1]
            except ValueError:
                res += c + path
                index = pathlen - 1
        elif c == percent:  # variable or '%'
            if path[index + 1:index + 2] == percent:
                res += c
                index += 1
            else:
                path = path[index+1:]
                pathlen = len(path)
                try:
                    index = path.index(percent)
                except ValueError:
                    res += percent + path
                    index = pathlen - 1
                else:
                    var = path[:index]
                    try:
                        if environ is None:
                            value = os.fsencode(os.environ[os.fsdecode(var)])
                        else:
                            value = environ[var]
                    except KeyError:
                        value = percent + var + percent
                    res += value
        elif c == dollar:  # variable or '$$'
            if path[index + 1:index + 2] == dollar:
                res += c
                index += 1
            elif path[index + 1:index + 2] == brace:
                path = path[index+2:]
                pathlen = len(path)
                try:
                    index = path.index(rbrace)
                except ValueError:
                    res += dollar + brace + path
                    index = pathlen - 1
                else:
                    var = path[:index]
                    try:
                        if environ is None:
                            value = os.fsencode(os.environ[os.fsdecode(var)])
                        else:
                            value = environ[var]
                    except KeyError:
                        value = dollar + brace + var + rbrace
                    res += value
            else:
                var = path[:0]
                index += 1
                c = path[index:index + 1]
                while c and c in varchars:
                    var += c
                    index += 1
                    c = path[index:index + 1]
                try:
                    if environ is None:
                        value = os.fsencode(os.environ[os.fsdecode(var)])
                    else:
                        value = environ[var]
                except KeyError:
                    value = dollar + var
                res += value
                if c:
                    index -= 1
        else:
            res += c
        index += 1
    return res

# Normalize a path, e.g. A//B, A/./B and A/foo/../B all become A\B.
# Previously, this function also truncated pathnames to 8+3 format,
# but as this module is called "ntpath", that's obviously wrong!

def normpath(path):
    """Normalize path, eliminating double slashes, etc."""
    path = os.fspath(path)
    if isinstance(path, bytes):
        sep = b'\\'
        altsep = b'/'
        curdir = b'.'
        pardir = b'..'
        special_prefixes = (b'\\\\.\\', b'\\\\?\\')
    else:
        sep = '\\'
        altsep = '/'
        curdir = '.'
        pardir = '..'
        special_prefixes = ('\\\\.\\', '\\\\?\\')
    if path.startswith(special_prefixes):
        # in the case of paths with these prefixes:
        # \\.\ -> device names
        # \\?\ -> literal paths
        # do not do any normalization, but return the path unchanged
        return path
    path = path.replace(altsep, sep)
    prefix, path = splitdrive(path)

# collapse initial backslashes
    if path.startswith(sep):
        prefix += sep
        path = path.lstrip(sep)

comps = path.split(sep)
    i = 0
    while i < len(comps):
        if not comps[i] or comps[i] == curdir:
            del comps[i]
        elif comps[i] == pardir:
            if i > 0 and comps[i-1] != pardir:
                del comps[i-1:i+1]
                i -= 1
            elif i == 0 and prefix.endswith(sep):
                del comps[i]
            else:
                i += 1
        else:
            i += 1
    # If the path is now empty, substitute '.'
    if not prefix and not comps:
        comps.append(curdir)
    return prefix + sep.join(comps)

def _abspath_fallback(path):
    """Return the absolute version of a path as a fallback function in case
    `nt._getfullpathname` is not available or raises OSError. See bpo-31047 for
    more.

"""

path = os.fspath(path)
    if not isabs(path):
        if isinstance(path, bytes):
            cwd = os.getcwdb()
        else:
            cwd = os.getcwd()
        path = join(cwd, path)
    return normpath(path)

# Return an absolute path.
try:
    from nt import _getfullpathname

except ImportError: # not running on Windows - mock up something sensible
    abspath = _abspath_fallback

else:  # use native Windows method on Windows
    def abspath(path):
        """Return the absolute version of a path."""
        try:
            return normpath(_getfullpathname(path))
        except (OSError, ValueError):
            return _abspath_fallback(path)

# realpath is a no-op on systems without islink support
realpath = abspath
# Win9x family and earlier have no Unicode filename support.
supports_unicode_filenames = (hasattr(sys, "getwindowsversion") and
                              sys.getwindowsversion()[3] >= 2)

def relpath(path, start=None):
    """Return a relative version of a path"""
    path = os.fspath(path)
    if isinstance(path, bytes):
        sep = b'\\'
        curdir = b'.'
        pardir = b'..'
    else:
        sep = '\\'
        curdir = '.'
        pardir = '..'

if start is None:
        start = curdir

if not path:
        raise ValueError("no path specified")

start = os.fspath(start)
    try:
        start_abs = abspath(normpath(start))
        path_abs = abspath(normpath(path))
        start_drive, start_rest = splitdrive(start_abs)
        path_drive, path_rest = splitdrive(path_abs)
        if normcase(start_drive) != normcase(path_drive):
            raise ValueError("path is on mount %r, start on mount %r" % (
                path_drive, start_drive))

start_list = [x for x in start_rest.split(sep) if x]
        path_list = [x for x in path_rest.split(sep) if x]
        # Work out how much of the filepath is shared by start and path.
        i = 0
        for e1, e2 in zip(start_list, path_list):
            if normcase(e1) != normcase(e2):
                break
            i += 1

rel_list = [pardir] * (len(start_list)-i) + path_list[i:]
        if not rel_list:
            return curdir
        return join(*rel_list)
    except (TypeError, ValueError, AttributeError, BytesWarning, DeprecationWarning):
        genericpath._check_arg_types('relpath', path, start)
        raise

# Return the longest common sub-path of the sequence of paths given as input.
# The function is case-insensitive and 'separator-insensitive', i.e. if the
# only difference between two paths is the use of '\' versus '/' as separator,
# they are deemed to be equal.
#
# However, the returned path will have the standard '\' separator (even if the
# given paths had the alternative '/' separator) and will have the case of the
# first path given in the sequence. Additionally, any trailing separator is
# stripped from the returned path.

def commonpath(paths):
    """Given a sequence of path names, returns the longest common sub-path."""

if not paths:
        raise ValueError('commonpath() arg is an empty sequence')

paths = tuple(map(os.fspath, paths))
    if isinstance(paths[0], bytes):
        sep = b'\\'
        altsep = b'/'
        curdir = b'.'
    else:
        sep = '\\'
        altsep = '/'
        curdir = '.'

try:
        drivesplits = [splitdrive(p.replace(altsep, sep).lower()) for p in paths]
        split_paths = [p.split(sep) for d, p in drivesplits]

try:
            isabs, = set(p[:1] == sep for d, p in drivesplits)
        except ValueError:
            raise ValueError("Can't mix absolute and relative paths") from None

# Check that all drive letters or UNC paths match. The check is made only
        # now otherwise type errors for mixing strings and bytes would not be
        # caught.
        if len(set(d for d, p in drivesplits)) != 1:
            raise ValueError("Paths don't have the same drive")

drive, path = splitdrive(paths[0].replace(altsep, sep))
        common = path.split(sep)
        common = [c for c in common if c and c != curdir]

split_paths = [[c for c in s if c and c != curdir] for s in split_paths]
        s1 = min(split_paths)
        s2 = max(split_paths)
        for i, c in enumerate(s1):
            if c != s2[i]:
                common = common[:i]
                break
        else:
            common = common[:len(s1)]

prefix = drive + sep if isabs else drive
        return prefix + sep.join(common)
    except (TypeError, AttributeError):
        genericpath._check_arg_types('commonpath', *paths)
        raise

# determine if two files are in fact the same file
try:
    # GetFinalPathNameByHandle is available starting with Windows 6.0.
    # Windows XP and non-Windows OS'es will mock _getfinalpathname.
    if sys.getwindowsversion()[:2] >= (6, 0):
        from nt import _getfinalpathname
    else:
        raise ImportError
except (AttributeError, ImportError):
    # On Windows XP and earlier, two files are the same if their absolute
    # pathnames are the same.
    # Non-Windows operating systems fake this method with an XP
    # approximation.
    def _getfinalpathname(f):
        return normcase(abspath(f))

try:
    # The genericpath.isdir implementation uses os.stat and checks the mode
    # attribute to tell whether or not the path is a directory.
    # This is overkill on Windows - just pass the path to GetFileAttributes
    # and check the attribute from there.
    from nt import _isdir as isdir
except ImportError:
    # Use genericpath.isdir as imported above.
    pass

cmd: