gh-105751: test_ctypes gets Windows attrs from ctypes

test_ctypes now gets attributes specific to Windows from the ctypes
module, rather than relying on "from ctypes import *".

Attributes:

* ctypes.FormatError
* ctypes.WINFUNCTYPE
* ctypes.WinError
* ctypes.WinDLL
* ctypes.windll
* ctypes.oledll
* ctypes.get_last_error()
* ctypes.set_last_error()

Author: vstinner

Lib/test/test_ctypes/test_as_parameter.py

@@ -1,13 +1,14 @@
 import unittest
+import ctypes
 from ctypes import *
 from test.test_ctypes import need_symbol
 import _ctypes_test
 
 dll = CDLL(_ctypes_test.__file__)
 
 try:
-    CALLBACK_FUNCTYPE = WINFUNCTYPE
-except NameError:
+    CALLBACK_FUNCTYPE = ctypes.WINFUNCTYPE
+except AttributeError:
     # fake to enable this test on Linux
     CALLBACK_FUNCTYPE = CFUNCTYPE
 

Lib/test/test_ctypes/test_callbacks.py

@@ -2,6 +2,7 @@
 import unittest
 from test import support
 
+import ctypes
 from ctypes import *
 from test.test_ctypes import need_symbol
 from _ctypes import CTYPES_MAX_ARGCOUNT
@@ -152,7 +153,7 @@ def __del__(self):
 
     @need_symbol('WINFUNCTYPE')
     def test_i38748_stackCorruption(self):
-        callback_funcType = WINFUNCTYPE(c_long, c_long, c_longlong)
+        callback_funcType = ctypes.WINFUNCTYPE(c_long, c_long, c_longlong)
         @callback_funcType
         def callback(a, b):
             c = a + b
@@ -163,12 +164,10 @@ def callback(a, b):
         self.assertEqual(dll._test_i38748_runCallback(callback, 5, 10), 15)
 
 
-@need_symbol('WINFUNCTYPE')
-class StdcallCallbacks(Callbacks):
-    try:
-        functype = WINFUNCTYPE
-    except NameError:
-        pass
+if hasattr(ctypes, 'WINFUNCTYPE'):
+    class StdcallCallbacks(Callbacks):
+        functype = ctypes.WINFUNCTYPE
+
 
 ################################################################
 
@@ -216,13 +215,14 @@ def test_issue_8959_b(self):
         global windowCount
         windowCount = 0
 
-        @WINFUNCTYPE(BOOL, HWND, LPARAM)
+        @ctypes.WINFUNCTYPE(BOOL, HWND, LPARAM)
         def EnumWindowsCallbackFunc(hwnd, lParam):
             global windowCount
             windowCount += 1
             return True #Allow windows to keep enumerating
 
-        windll.user32.EnumWindows(EnumWindowsCallbackFunc, 0)
+        user32 = ctypes.windll.user32
+        user32.EnumWindows(EnumWindowsCallbackFunc, 0)
 
     def test_callback_register_int(self):
         # Issue #8275: buggy handling of callback args under Win64

Lib/test/test_ctypes/test_cfuncs.py

@@ -2,6 +2,7 @@
 # Byte order related?
 
 import unittest
+import ctypes
 from ctypes import *
 from test.test_ctypes import need_symbol
 
@@ -197,22 +198,17 @@ def test_void(self):
 
 # The following repeats the above tests with stdcall functions (where
 # they are available)
-try:
-    WinDLL
-except NameError:
-    def stdcall_dll(*_): pass
-else:
-    class stdcall_dll(WinDLL):
+if hasattr(ctypes, 'WinDLL'):
+    class stdcall_dll(ctypes.WinDLL):
         def __getattr__(self, name):
             if name[:2] == '__' and name[-2:] == '__':
                 raise AttributeError(name)
             func = self._FuncPtr(("s_" + name, self))
             setattr(self, name, func)
             return func
 
-@need_symbol('WinDLL')
-class stdcallCFunctions(CFunctions):
-    _dll = stdcall_dll(_ctypes_test.__file__)
+    class stdcallCFunctions(CFunctions):
+        _dll = stdcall_dll(_ctypes_test.__file__)
 
 if __name__ == '__main__':
     unittest.main()

Lib/test/test_ctypes/test_checkretval.py

@@ -1,5 +1,6 @@
 import unittest
 
+import ctypes
 from ctypes import *
 from test.test_ctypes import need_symbol
 
@@ -28,9 +29,8 @@ def test_checkretval(self):
 
     @need_symbol('oledll')
     def test_oledll(self):
-        self.assertRaises(OSError,
-                              oledll.oleaut32.CreateTypeLib2,
-                              0, None, None)
+        oleaut32 = ctypes.oledll.oleaut32
+        self.assertRaises(OSError, oleaut32.CreateTypeLib2, 0, None, None)
 
 if __name__ == "__main__":
     unittest.main()

Lib/test/test_ctypes/test_errno.py

@@ -1,6 +1,7 @@
 import unittest, os, errno
 import threading
 
+import ctypes
 from ctypes import *
 from ctypes.util import find_library
 
@@ -44,33 +45,33 @@ def _worker():
 
     @unittest.skipUnless(os.name == "nt", 'Test specific to Windows')
     def test_GetLastError(self):
-        dll = WinDLL("kernel32", use_last_error=True)
+        dll = ctypes.WinDLL("kernel32", use_last_error=True)
         GetModuleHandle = dll.GetModuleHandleA
         GetModuleHandle.argtypes = [c_wchar_p]
 
         self.assertEqual(0, GetModuleHandle("foo"))
-        self.assertEqual(get_last_error(), 126)
+        self.assertEqual(ctypes.get_last_error(), 126)
 
-        self.assertEqual(set_last_error(32), 126)
-        self.assertEqual(get_last_error(), 32)
+        self.assertEqual(ctypes.set_last_error(32), 126)
+        self.assertEqual(ctypes.get_last_error(), 32)
 
         def _worker():
-            set_last_error(0)
+            ctypes.set_last_error(0)
 
-            dll = WinDLL("kernel32", use_last_error=False)
+            dll = ctypes.WinDLL("kernel32", use_last_error=False)
             GetModuleHandle = dll.GetModuleHandleW
             GetModuleHandle.argtypes = [c_wchar_p]
             GetModuleHandle("bar")
 
-            self.assertEqual(get_last_error(), 0)
+            self.assertEqual(ctypes.get_last_error(), 0)
 
         t = threading.Thread(target=_worker)
         t.start()
         t.join()
 
-        self.assertEqual(get_last_error(), 32)
+        self.assertEqual(ctypes.get_last_error(), 32)
 
-        set_last_error(0)
+        ctypes.set_last_error(0)
 
 if __name__ == "__main__":
     unittest.main()

Lib/test/test_ctypes/test_funcptr.py

@@ -1,9 +1,10 @@
 import unittest
+import ctypes
 from ctypes import *
 
 try:
-    WINFUNCTYPE
-except NameError:
+    WINFUNCTYPE = ctypes.WINFUNCTYPE
+except AttributeError:
     # fake to enable this test on Linux
     WINFUNCTYPE = CFUNCTYPE
 
@@ -39,7 +40,7 @@ def func(a, b):
         # possible, as in C, to call cdecl functions with more parameters.
         #self.assertRaises(TypeError, c, 1, 2, 3)
         self.assertEqual(c(1, 2, 3, 4, 5, 6), 3)
-        if not WINFUNCTYPE is CFUNCTYPE:
+        if WINFUNCTYPE is not CFUNCTYPE:
             self.assertRaises(TypeError, s, 1, 2, 3)
 
     def test_structures(self):
@@ -91,7 +92,7 @@ def test_dllfunctions(self):
 
         def NoNullHandle(value):
             if not value:
-                raise WinError()
+                raise ctypes.WinError()
             return value
 
         strchr = lib.my_strchr

Lib/test/test_ctypes/test_functions.py

@@ -5,20 +5,21 @@
 Later...
 """
 
+import ctypes
 from ctypes import *
 from test.test_ctypes import need_symbol
 import sys, unittest
 
 try:
-    WINFUNCTYPE
-except NameError:
+    WINFUNCTYPE = ctypes.WINFUNCTYPE
+except AttributeError:
     # fake to enable this test on Linux
     WINFUNCTYPE = CFUNCTYPE
 
 import _ctypes_test
 dll = CDLL(_ctypes_test.__file__)
 if sys.platform == "win32":
-    windll = WinDLL(_ctypes_test.__file__)
+    windll = ctypes.WinDLL(_ctypes_test.__file__)
 
 class POINT(Structure):
     _fields_ = [("x", c_int), ("y", c_int)]

Lib/test/test_ctypes/test_loading.py

@@ -1,4 +1,5 @@
 from ctypes import *
+import ctypes
 import os
 import shutil
 import subprocess
@@ -72,18 +73,18 @@ def test_load_library(self):
             print(find_library("user32"))
 
         if os.name == "nt":
-            windll.kernel32.GetModuleHandleW
-            windll["kernel32"].GetModuleHandleW
-            windll.LoadLibrary("kernel32").GetModuleHandleW
-            WinDLL("kernel32").GetModuleHandleW
+            ctypes.windll.kernel32.GetModuleHandleW
+            ctypes.windll["kernel32"].GetModuleHandleW
+            ctypes.windll.LoadLibrary("kernel32").GetModuleHandleW
+            ctypes.WinDLL("kernel32").GetModuleHandleW
             # embedded null character
-            self.assertRaises(ValueError, windll.LoadLibrary, "kernel32\0")
+            self.assertRaises(ValueError, ctypes.windll.LoadLibrary, "kernel32\0")
 
     @unittest.skipUnless(os.name == "nt",
                          'test specific to Windows')
     def test_load_ordinal_functions(self):
         import _ctypes_test
-        dll = WinDLL(_ctypes_test.__file__)
+        dll = ctypes.WinDLL(_ctypes_test.__file__)
         # We load the same function both via ordinal and name
         func_ord = dll[2]
         func_name = dll.GetString
@@ -114,14 +115,16 @@ def test_1703286_B(self):
         # also has a high address.  'call_function' should accept
         # addresses so large.
         from _ctypes import call_function
-        advapi32 = windll.advapi32
+
+        advapi32 = ctypes.windll.advapi32
         # Calling CloseEventLog with a NULL argument should fail,
         # but the call should not segfault or so.
         self.assertEqual(0, advapi32.CloseEventLog(None))
-        windll.kernel32.GetProcAddress.argtypes = c_void_p, c_char_p
-        windll.kernel32.GetProcAddress.restype = c_void_p
-        proc = windll.kernel32.GetProcAddress(advapi32._handle,
-                                              b"CloseEventLog")
+
+        kernel32 = ctypes.windll.kernel32
+        kernel32.GetProcAddress.argtypes = c_void_p, c_char_p
+        kernel32.GetProcAddress.restype = c_void_p
+        proc = kernel32.GetProcAddress(advapi32._handle, b"CloseEventLog")
         self.assertTrue(proc)
         # This is the real test: call the function via 'call_function'
         self.assertEqual(0, call_function(proc, (None,)))
@@ -130,7 +133,7 @@ def test_1703286_B(self):
                          'test specific to Windows')
     def test_load_hasattr(self):
         # bpo-34816: shouldn't raise OSError
-        self.assertFalse(hasattr(windll, 'test'))
+        self.assertFalse(hasattr(ctypes.windll, 'test'))
 
     @unittest.skipUnless(os.name == "nt",
                          'test specific to Windows')

Lib/test/test_ctypes/test_pointers.py

@@ -1,5 +1,6 @@
 import unittest, sys
 
+import ctypes
 from ctypes import *
 import _ctypes_test
 
@@ -193,7 +194,7 @@ def test_pointers_bool(self):
 
         # COM methods are boolean True:
         if sys.platform == "win32":
-            mth = WINFUNCTYPE(None)(42, "name", (), None)
+            mth = ctypes.WINFUNCTYPE(None)(42, "name", (), None)
             self.assertEqual(bool(mth), True)
 
     def test_pointer_type_name(self):

Lib/test/test_ctypes/test_random_things.py

@@ -1,4 +1,5 @@
 from ctypes import *
+import ctypes
 import contextlib
 from test import support
 import unittest
@@ -16,15 +17,17 @@ class call_function_TestCase(unittest.TestCase):
 
     def test(self):
         from _ctypes import call_function
-        windll.kernel32.LoadLibraryA.restype = c_void_p
-        windll.kernel32.GetProcAddress.argtypes = c_void_p, c_char_p
-        windll.kernel32.GetProcAddress.restype = c_void_p
 
-        hdll = windll.kernel32.LoadLibraryA(b"kernel32")
-        funcaddr = windll.kernel32.GetProcAddress(hdll, b"GetModuleHandleA")
+        kernel32 = ctypes.windll.kernel32
+        kernel32.LoadLibraryA.restype = c_void_p
+        kernel32.GetProcAddress.argtypes = c_void_p, c_char_p
+        kernel32.GetProcAddress.restype = c_void_p
+
+        hdll = kernel32.LoadLibraryA(b"kernel32")
+        funcaddr = kernel32.GetProcAddress(hdll, b"GetModuleHandleA")
 
         self.assertEqual(call_function(funcaddr, (None,)),
-                             windll.kernel32.GetModuleHandleA(None))
+                         kernel32.GetModuleHandleA(None))
 
 class CallbackTracbackTestCase(unittest.TestCase):
     # When an exception is raised in a ctypes callback function, the C