diff --git a/Doc/library/functools.rst b/Doc/library/functools.rst
index 4eeafad3fbd9156..8f975097a878439 100644
--- a/Doc/library/functools.rst
+++ b/Doc/library/functools.rst
@@ -476,8 +476,12 @@ The :mod:`!functools` module defines the following functions:
               value = next(it)
           else:
               value = initial
-          for element in it:
-              value = function(value, element)
+          while(True):
+              try:
+                  element = next(it)
+              except StopIteration:
+                  break
+          value = function(value, element)
           return value
 
    See :func:`itertools.accumulate` for an iterator that yields all intermediate
diff --git a/Doc/library/os.path.rst b/Doc/library/os.path.rst
index f5ddb426c915f5a..4825093ccfe6d12 100644
--- a/Doc/library/os.path.rst
+++ b/Doc/library/os.path.rst
@@ -415,7 +415,9 @@ the :mod:`glob` module.)
 
    Normalize the case of a pathname.  On Windows, convert all characters in the
    pathname to lowercase, and also convert forward slashes to backward slashes.
-   On other operating systems, return the path unchanged.
+   On other operating systems (Posix),  return String or Bytes converted from
+   Path-like Object
+
 
    .. versionchanged:: 3.6
       Accepts a :term:`path-like object`.
diff --git a/Lib/functools.py b/Lib/functools.py
index 2c08791d4d2651b..34185660e104d33 100644
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -259,7 +259,12 @@ def reduce(function, sequence, /, initial=_initial_missing):
     else:
         value = initial
 
-    for element in it:
+    while(True):
+        try:
+           element = next(it)
+        except StopIteration:
+            # Stop when no elements are left
+            break
         value = function(value, element)
 
     return value
diff --git a/Lib/posixpath.py b/Lib/posixpath.py
index 8025b063397a038..b1bf3f258a77f1d 100644
--- a/Lib/posixpath.py
+++ b/Lib/posixpath.py
@@ -52,7 +52,7 @@ def _get_sep(path):
 # (another function should be defined to do that).
 
 def normcase(s, /):
-    """Normalize case of pathname.  Has no effect under Posix"""
+    """Normalize case of pathname.  Normalizes path-like Objects into Str or Bytes """
     return os.fspath(s)
 
 
diff --git a/Lib/test/test_reduce.py b/Lib/test/test_reduce.py
new file mode 100644
index 000000000000000..5cddee2fb293a2c
--- /dev/null
+++ b/Lib/test/test_reduce.py
@@ -0,0 +1,28 @@
+import unittest
+import operator
+import sys
+import functools as c_functools
+
+class Test_reduce(unittest.TestCase):
+    def test_add_func(self):
+        del sys.modules['functools']
+        sys.modules['_functools'] = None  # block the C accelerator
+        import functools as py_functools
+
+        class Iterator:
+            def __init__(self):
+                self.items = [1, 2, 3, 4, 4]
+            def __next__(self):
+                if not self.items:
+                    raise StopIteration
+                return self.items.pop(0)
+        class Iterable:
+            def __iter__(self):
+                return Iterator()
+        self.assertEqual(
+            c_functools.reduce(operator.add, Iterable()),
+            py_functools.reduce(operator.add, Iterable())
+        )
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/Misc/NEWS.d/next/Documentation/2026-10-29-18-57-38.gh-issue-160904.nyxAv_.rst b/Misc/NEWS.d/next/Documentation/2026-10-29-18-57-38.gh-issue-160904.nyxAv_.rst
new file mode 100644
index 000000000000000..03dd3581b5fce45
--- /dev/null
+++ b/Misc/NEWS.d/next/Documentation/2026-10-29-18-57-38.gh-issue-160904.nyxAv_.rst
@@ -0,0 +1 @@
+FiX: In Function os.path.normcase in Lib/posixpath.py docstring states path remains unchanged on POSIX Systems which is not true. Updated Docstring and documentation