gh-136437: Make several functions in os.path pos-only (#136949)

Lib/ntpath.py

@@ -47,7 +47,7 @@ try:
         LOCALE_NAME_INVARIANT as _LOCALE_NAME_INVARIANT,
         LCMAP_LOWERCASE as _LCMAP_LOWERCASE)
 
-    def normcase(s):
+    def normcase(s, /):
         """Normalize case of pathname.
 
         Makes all characters lowercase and all slashes into backslashes.
@@ -66,7 +66,7 @@ try:
                                   _LCMAP_LOWERCASE,
                                   s.replace('/', '\\'))
 except ImportError:
-    def normcase(s):
+    def normcase(s, /):
         """Normalize case of pathname.
 
         Makes all characters lowercase and all slashes into backslashes.
@@ -77,7 +77,7 @@ except ImportError:
         return s.replace('/', '\\').lower()
 
 
-def isabs(s):
+def isabs(s, /):
     """Test whether a path is absolute"""
     s = os.fspath(s)
     if isinstance(s, bytes):
@@ -96,7 +96,7 @@ def isabs(s):
 
 
 # Join two (or more) paths.
-def join(path, *paths):
+def join(path, /, *paths):
     path = os.fspath(path)
     if isinstance(path, bytes):
         sep = b'\\'
@@ -143,7 +143,7 @@ def join(path, *paths):
 # 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):
+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.
 
@@ -169,7 +169,7 @@ def splitdrive(p):
 try:
     from nt import _path_splitroot_ex as splitroot
 except ImportError:
-    def splitroot(p):
+    def splitroot(p, /):
         """Split a pathname into drive, root and tail.
 
         The tail contains anything after the root."""
@@ -219,7 +219,7 @@ except ImportError:
 # join(head, tail) == p holds.
 # The resulting head won't end in '/' unless it is the root.
 
-def split(p):
+def split(p, /):
     """Split a pathname.
 
     Return tuple (head, tail) where tail is everything after the final slash.
@@ -240,7 +240,7 @@ def split(p):
 # pathname component; the root is everything before that.
 # It is always true that root + ext == p.
 
-def splitext(p):
+def splitext(p, /):
     p = os.fspath(p)
     if isinstance(p, bytes):
         return genericpath._splitext(p, b'\\', b'/', b'.')
@@ -251,14 +251,14 @@ splitext.__doc__ = genericpath._splitext.__doc__
 
 # Return the tail (basename) part of a path.
 
-def basename(p):
+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):
+def dirname(p, /):
     """Returns the directory component of a pathname"""
     return split(p)[0]
 
@@ -601,7 +601,7 @@ try:
     from nt import _findfirstfile, _getfinalpathname, readlink as _nt_readlink
 except ImportError:
     # realpath is a no-op on systems without _getfinalpathname support.
-    def realpath(path, *, strict=False):
+    def realpath(path, /, *, strict=False):
         return abspath(path)
 else:
     def _readlink_deep(path, ignored_error=OSError):
@@ -702,7 +702,7 @@ else:
                 tail = join(name, tail) if tail else name
         return tail
 
-    def realpath(path, *, strict=False):
+    def realpath(path, /, *, strict=False):
         path = normpath(path)
         if isinstance(path, bytes):
             prefix = b'\\\\?\\'