gh-133866: remove deprecated and undocumented function ctypes.SetPointerType

Doc/whatsnew/3.15.rst

@@ -121,6 +121,13 @@ Deprecated
 Removed
 =======
 
+ctypes
+------
+
+* Removed the undocumented function :func:`!ctypes.SetPointerType`.
+  (Contributed by Bénédikt Tran in :gh:`133866`.)
+
+
 sysconfig
 ---------
 

Lib/ctypes/__init__.py

@@ -379,12 +379,6 @@ def create_unicode_buffer(init, size=None):
         return buf
     raise TypeError(init)
 
-
-def SetPointerType(pointer, cls):
-    import warnings
-    warnings._deprecated("ctypes.SetPointerType", remove=(3, 15))
-    pointer.set_type(cls)
-
 def ARRAY(typ, len):
     return typ * len
 

Lib/test/test_ctypes/test_incomplete.py

@@ -21,9 +21,7 @@ class cell(Structure):
             _fields_ = [("name", c_char_p),
                         ("next", lpcell)]
 
-        with warnings.catch_warnings():
-            warnings.simplefilter('ignore', DeprecationWarning)
-            ctypes.SetPointerType(lpcell, cell)
+        lpcell.set_type(cell)
 
         self.assertIs(POINTER(cell), lpcell)
 
@@ -50,10 +48,9 @@ class cell(Structure):
             _fields_ = [("name", c_char_p),
                         ("next", lpcell)]
 
-        with self.assertWarns(DeprecationWarning):
-            ctypes.SetPointerType(lpcell, cell)
-
+        lpcell.set_type(cell)
         self.assertIs(POINTER(cell), lpcell)
 
+
 if __name__ == '__main__':
     unittest.main()

Misc/NEWS.d/next/Library/2025-05-11-10-01-48.gh-issue-133866.g3dHP_.rst

@@ -0,0 +1,2 @@
+Remove the undocumented function :func:`!ctypes.SetPointerType`.
+Patch by Bénédikt Tran.