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usr
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lib64
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python3.9
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/usr/lib64/python3.9
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asyncio/
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collections/
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concurrent/
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config-3.9-x86_64-linux-gnu/
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ctypes/
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curses/
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dbm/
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distutils/
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email/
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encodings/
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ensurepip/
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http/
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importlib/
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json/
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lib2to3/
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logging/
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multiprocessing/
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pydoc_data/
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site-packages/
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sqlite3/
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unittest/
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urllib/
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venv/
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wsgiref/
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xml/
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xmlrpc/
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zoneinfo/
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__pycache__/
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abc.py
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base64.py
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codecs.py
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codeop.py
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colorsys.py
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compileall.py
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configparser.py
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contextlib.py
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contextvars.py
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copy.py
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copyreg.py
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cProfile.py
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crypt.py
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csv.py
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dataclasses.py
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datetime.py
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decimal.py
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difflib.py
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dis.py
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doctest.py
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enum.py
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filecmp.py
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formatter.py
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fractions.py
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ftplib.py
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functools.py
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genericpath.py
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getopt.py
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getpass.py
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gettext.py
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glob.py
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graphlib.py
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gzip.py
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hashlib.py
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heapq.py
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imghdr.py
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inspect.py
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ipaddress.py
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LICENSE.txt
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linecache.py
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locale.py
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lzma.py
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mailbox.py
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mailcap.py
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mimetypes.py
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modulefinder.py
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netrc.py
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nntplib.py
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ntpath.py
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nturl2path.py
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numbers.py
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opcode.py
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operator.py
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optparse.py
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os.py
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pathlib.py
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pdb.py
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pickle.py
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pickletools.py
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pipes.py
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pkgutil.py
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platform.py
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plistlib.py
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poplib.py
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posixpath.py
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pprint.py
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profile.py
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pstats.py
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pty.py
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pyclbr.py
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pydoc.py
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py_compile.py
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queue.py
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quopri.py
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random.py
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re.py
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reprlib.py
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rlcompleter.py
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runpy.py
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sched.py
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secrets.py
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selectors.py
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shelve.py
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shlex.py
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shutil.py
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signal.py
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site.py
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smtpd.py
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smtplib.py
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sndhdr.py
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socket.py
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socketserver.py
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sre_compile.py
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sre_constants.py
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sre_parse.py
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ssl.py
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stat.py
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statistics.py
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string.py
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stringprep.py
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struct.py
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subprocess.py
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symbol.py
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symtable.py
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sysconfig.py
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tabnanny.py
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tarfile.py
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telnetlib.py
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tempfile.py
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textwrap.py
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this.py
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threading.py
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timeit.py
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token.py
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tokenize.py
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trace.py
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traceback.py
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tracemalloc.py
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types.py
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typing.py
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uu.py
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uuid.py
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warnings.py
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wave.py
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weakref.py
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webbrowser.py
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xdrlib.py
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zipapp.py
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zipfile.py
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zipimport.py
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_aix_support.py
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_bootlocale.py
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_collections_abc.py
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_compat_pickle.py
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_compression.py
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__future__.py
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__phello__.foo.py
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Edit:
/usr/lib64/python3.9/posixpath.py
(16146B)
"""Common operations on Posix pathnames. Instead of importing this module directly, import os and refer to this module as os.path. The "os.path" name is an alias for this module on Posix systems; on other systems (e.g. Windows), os.path provides the same operations in a manner specific to that platform, and is an alias to another module (e.g. ntpath). Some of this can actually be useful on non-Posix systems too, e.g. for manipulation of the pathname component of URLs. """ # 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 = ':' defpath = '/bin:/usr/bin' altsep = None devnull = '/dev/null' 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", "samefile","sameopenfile","samestat", "curdir","pardir","sep","pathsep","defpath","altsep","extsep", "devnull","realpath","supports_unicode_filenames","relpath", "commonpath", "ALLOW_MISSING"] def _get_sep(path): if isinstance(path, bytes): return b'/' else: return '/' # Normalize the case of a pathname. Trivial in Posix, string.lower on Mac. # On MS-DOS this may also turn slashes into backslashes; however, other # normalizations (such as optimizing '../' away) are not allowed # (another function should be defined to do that). def normcase(s): """Normalize case of pathname. Has no effect under Posix""" return os.fspath(s) # Return whether a path is absolute. # Trivial in Posix, harder on the Mac or MS-DOS. def isabs(s): """Test whether a path is absolute""" s = os.fspath(s) sep = _get_sep(s) return s.startswith(sep) # Join pathnames. # Ignore the previous parts if a part is absolute. # Insert a '/' unless the first part is empty or already ends in '/'. def join(a, *p): """Join two or more pathname components, inserting '/' as needed. If any component is an absolute path, all previous path components will be discarded. An empty last part will result in a path that ends with a separator.""" a = os.fspath(a) sep = _get_sep(a) path = a try: if not p: path[:0] + sep #23780: Ensure compatible data type even if p is null. for b in map(os.fspath, p): if b.startswith(sep): path = b elif not path or path.endswith(sep): path += b else: path += sep + b except (TypeError, AttributeError, BytesWarning): genericpath._check_arg_types('join', a, *p) raise return path # Split a path in head (everything up to the last '/') and tail (the # rest). If the path ends in '/', tail will be empty. If there is no # '/' in the path, head will be empty. # Trailing '/'es are stripped from head unless it is the root. def split(p): """Split a pathname. Returns tuple "(head, tail)" where "tail" is everything after the final slash. Either part may be empty.""" p = os.fspath(p) sep = _get_sep(p) i = p.rfind(sep) + 1 head, tail = p[:i], p[i:] if head and head != sep*len(head): head = head.rstrip(sep) return 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): sep = b'/' extsep = b'.' else: sep = '/' extsep = '.' return genericpath._splitext(p, sep, None, extsep) splitext.__doc__ = genericpath._splitext.__doc__ # Split a pathname into a drive specification and the rest of the # path. Useful on DOS/Windows/NT; on Unix, the drive is always empty. def splitdrive(p): """Split a pathname into drive and path. On Posix, drive is always empty.""" p = os.fspath(p) return p[:0], p # Return the tail (basename) part of a path, same as split(path)[1]. def basename(p): """Returns the final component of a pathname""" p = os.fspath(p) sep = _get_sep(p) i = p.rfind(sep) + 1 return p[i:] # Return the head (dirname) part of a path, same as split(path)[0]. def dirname(p): """Returns the directory component of a pathname""" p = os.fspath(p) sep = _get_sep(p) i = p.rfind(sep) + 1 head = p[:i] if head and head != sep*len(head): head = head.rstrip(sep) return head # 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""" try: st = os.lstat(path) except (OSError, ValueError, 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: os.lstat(path) except (OSError, ValueError): return False return True # Is a path a mount point? # (Does this work for all UNIXes? Is it even guaranteed to work by Posix?) def ismount(path): """Test whether a path is a mount point""" try: s1 = os.lstat(path) except (OSError, ValueError): # It doesn't exist -- so not a mount point. :-) return False else: # A symlink can never be a mount point if stat.S_ISLNK(s1.st_mode): return False if isinstance(path, bytes): parent = join(path, b'..') else: parent = join(path, '..') parent = realpath(parent) try: s2 = os.lstat(parent) except (OSError, ValueError): return False dev1 = s1.st_dev dev2 = s2.st_dev if dev1 != dev2: return True # path/.. on a different device as path ino1 = s1.st_ino ino2 = s2.st_ino if ino1 == ino2: return True # path/.. is the same i-node as path 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 constructions. 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 sep = _get_sep(path) i = path.find(sep, 1) if i < 0: i = len(path) if i == 1: if 'HOME' not in os.environ: import pwd try: userhome = pwd.getpwuid(os.getuid()).pw_dir except KeyError: # bpo-10496: if the current user identifier doesn't exist in the # password database, return the path unchanged return path else: userhome = os.environ['HOME'] else: import pwd name = path[1:i] if isinstance(name, bytes): name = str(name, 'ASCII') try: pwent = pwd.getpwnam(name) except KeyError: # bpo-10496: if the user name from the path doesn't exist in the # password database, return the path unchanged return path userhome = pwent.pw_dir if isinstance(path, bytes): userhome = os.fsencode(userhome) root = b'/' else: root = '/' userhome = userhome.rstrip(root) return (userhome + path[i:]) or root # Expand paths containing shell variable substitutions. # This expands the forms $variable and ${variable} only. # Non-existent variables are left unchanged. _varpattern = r'\$(\w+|\{[^}]*\}?)' _varsub = None _varsubb = None def expandvars(path): """Expand shell variables of form $var and ${var}. Unknown variables are left unchanged.""" path = os.fspath(path) global _varsub, _varsubb if isinstance(path, bytes): if b'$' not in path: return path if not _varsubb: import re _varsubb = re.compile(_varpattern.encode(), re.ASCII).sub sub = _varsubb start = b'{' end = b'}' environ = getattr(os, 'environb', None) else: if '$' not in path: return path if not _varsub: import re _varsub = re.compile(_varpattern, re.ASCII).sub sub = _varsub start = '{' end = '}' environ = os.environ def repl(m): name = m[1] if name.startswith(start): if not name.endswith(end): return m[0] name = name[1:-1] try: if environ is None: value = os.fsencode(os.environ[os.fsdecode(name)]) else: value = environ[name] except KeyError: return m[0] else: return value return sub(repl, path) # Normalize a path, e.g. A//B, A/./B and A/foo/../B all become A/B. # It should be understood that this may change the meaning of the path # if it contains symbolic links! def normpath(path): """Normalize path, eliminating double slashes, etc.""" path = os.fspath(path) if isinstance(path, bytes): sep = b'/' empty = b'' dot = b'.' dotdot = b'..' else: sep = '/' empty = '' dot = '.' dotdot = '..' if path == empty: return dot initial_slashes = path.startswith(sep) # POSIX allows one or two initial slashes, but treats three or more # as single slash. # (see http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13) if (initial_slashes and path.startswith(sep*2) and not path.startswith(sep*3)): initial_slashes = 2 comps = path.split(sep) new_comps = [] for comp in comps: if comp in (empty, dot): continue if (comp != dotdot or (not initial_slashes and not new_comps) or (new_comps and new_comps[-1] == dotdot)): new_comps.append(comp) elif new_comps: new_comps.pop() comps = new_comps path = sep.join(comps) if initial_slashes: path = sep*initial_slashes + path return path or dot def abspath(path): """Return an absolute path.""" 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 a canonical path (i.e. the absolute location of a file on the # filesystem). def realpath(filename, *, strict=False): """Return the canonical path of the specified filename, eliminating any symbolic links encountered in the path.""" filename = os.fspath(filename) path, ok = _joinrealpath(filename[:0], filename, strict, {}) return abspath(path) # Join two paths, normalizing and eliminating any symbolic links # encountered in the second path. def _joinrealpath(path, rest, strict, seen): if isinstance(path, bytes): sep = b'/' curdir = b'.' pardir = b'..' else: sep = '/' curdir = '.' pardir = '..' getcwd = os.getcwd if strict is ALLOW_MISSING: ignored_error = FileNotFoundError elif strict: ignored_error = () else: ignored_error = OSError maxlinks = None if isabs(rest): rest = rest[1:] path = sep while rest: name, _, rest = rest.partition(sep) if not name or name == curdir: # current dir continue if name == pardir: # parent dir if path: path, name = split(path) if name == pardir: path = join(path, pardir, pardir) else: path = pardir continue newpath = join(path, name) try: st = os.lstat(newpath) except ignored_error: is_link = False else: is_link = stat.S_ISLNK(st.st_mode) if not is_link: path = newpath continue # Resolve the symbolic link if newpath in seen: # Already seen this path path = seen[newpath] if path is not None: # use cached value continue # The symlink is not resolved, so we must have a symlink loop. if strict: # Raise OSError(errno.ELOOP) os.stat(newpath) else: # Return already resolved part + rest of the path unchanged. return join(newpath, rest), False seen[newpath] = None # not resolved symlink path, ok = _joinrealpath(path, os.readlink(newpath), strict, seen) if not ok: return join(path, rest), False seen[newpath] = path # resolved symlink return path, True supports_unicode_filenames = (sys.platform == 'darwin') def relpath(path, start=None): """Return a relative version of a path""" if not path: raise ValueError("no path specified") path = os.fspath(path) if isinstance(path, bytes): curdir = b'.' sep = b'/' pardir = b'..' else: curdir = '.' sep = '/' pardir = '..' if start is None: start = curdir else: start = os.fspath(start) try: start_list = [x for x in abspath(start).split(sep) if x] path_list = [x for x in abspath(path).split(sep) if x] # Work out how much of the filepath is shared by start and path. i = len(commonprefix([start_list, path_list])) rel_list = [pardir] * (len(start_list)-i) + path_list[i:] if not rel_list: return curdir return join(*rel_list) except (TypeError, 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 paths are not normalized before comparing them (this is the # responsibility of the caller). 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'/' curdir = b'.' else: sep = '/' curdir = '.' try: split_paths = [path.split(sep) for path in paths] try: isabs, = set(p[:1] == sep for p in paths) except ValueError: raise ValueError("Can't mix absolute and relative paths") from None 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) common = s1 for i, c in enumerate(s1): if c != s2[i]: common = s1[:i] break prefix = sep if isabs else sep[:0] return prefix + sep.join(common) except (TypeError, AttributeError): genericpath._check_arg_types('commonpath', *paths) raise
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