Move test___all__ over to unittest.main() and use ModuleNotFoundError

Lib/test/regrtest.py

@@ -146,11 +146,11 @@
 
 try:
     import threading
-except ImportError:
+except ModuleNotFoundError:
     threading = None
 try:
     import multiprocessing.process
-except ImportError:
+except ModuleNotFoundError:
     multiprocessing = None
 
 
@@ -180,7 +180,7 @@
 if sys.platform == 'darwin':
     try:
         import resource
-    except ImportError:
+    except ModuleNotFoundError:
         pass
     else:
         soft, hard = resource.getrlimit(resource.RLIMIT_STACK)
@@ -571,7 +571,7 @@ def main(tests=None, testdir=None, verbose=0, quiet=False,
     if findleaks:
         try:
             import gc
-        except ImportError:
+        except ModuleNotFoundError:
             print('No GC available, disabling findleaks.')
             findleaks = False
         else:
@@ -692,7 +692,7 @@ def test_forever(tests=list(selected)):
     if use_mp:
         try:
             from threading import Thread
-        except ImportError:
+        except ModuleNotFoundError:
             print("Multiprocess option requires thread support")
             sys.exit(2)
         from queue import Queue
@@ -1396,7 +1396,7 @@ def dash_R(the_module, test, indirect_test, huntrleaks):
     pic = sys.path_importer_cache.copy()
     try:
         import zipimport
-    except ImportError:
+    except ModuleNotFoundError:
         zdc = None # Run unmodified on platforms without zipimport support
     else:
         zdc = zipimport._zip_directory_cache.copy()
@@ -1473,7 +1473,7 @@ def dash_R_cleanup(fs, ps, pic, zdc, abcs):
     sys.path_importer_cache.update(pic)
     try:
         import zipimport
-    except ImportError:
+    except ModuleNotFoundError:
         pass # Run unmodified on platforms without zipimport support
     else:
         zipimport._zip_directory_cache.clear()
@@ -1510,7 +1510,7 @@ def dash_R_cleanup(fs, ps, pic, zdc, abcs):
     doctest.master = None
     try:
         import ctypes
-    except ImportError:
+    except ModuleNotFoundError:
         # Don't worry about resetting the cache if ctypes is not supported
         pass
     else:

Lib/test/support.py

@@ -29,27 +29,27 @@
 
 try:
     import _thread, threading
-except ImportError:
+except ModuleNotFoundError:
     _thread = None
     threading = None
 try:
     import multiprocessing.process
-except ImportError:
+except ModuleNotFoundError:
     multiprocessing = None
 
 try:
     import zlib
-except ImportError:
+except ModuleNotFoundError:
     zlib = None
 
 try:
     import bz2
-except ImportError:
+except ModuleNotFoundError:
     bz2 = None
 
 try:
     import lzma
-except ImportError:
+except ModuleNotFoundError:
     lzma = None
 
 __all__ = [
@@ -116,7 +116,7 @@ def import_module(name, deprecated=False, *, required_on=()):
     with _ignore_deprecated_imports(deprecated):
         try:
             return importlib.import_module(name)
-        except ImportError as msg:
+        except ModuleNotFoundError as msg:
             if sys.platform.startswith(tuple(required_on)):
                 raise
             raise unittest.SkipTest(str(msg))
@@ -188,7 +188,7 @@ def import_fresh_module(name, fresh=(), blocked=(), deprecated=False):
                 if not _save_and_block_module(blocked_name, orig_modules):
                     names_to_remove.append(blocked_name)
             fresh_module = importlib.import_module(name)
-        except ImportError:
+        except ModuleNotFoundError:
             fresh_module = None
         finally:
             for orig_name, module in orig_modules.items():

Lib/test/test___all__.py

@@ -75,7 +75,7 @@ def test_all(self):
         try:
             import rlcompleter
             import locale
-        except ImportError:
+        except ModuleNotFoundError:
             pass
         else:
             locale.setlocale(locale.LC_CTYPE, 'C')
@@ -113,8 +113,5 @@ def test_all(self):
             print('Following modules failed to be imported:', failed_imports)
 
 
-def test_main():
-    support.run_unittest(AllTest)
-
 if __name__ == "__main__":
-    test_main()
+    unittest.main()

Lib/xmlrpc/server.py

@@ -116,7 +116,7 @@ def export_add(self, x, y):
 import traceback
 try:
     import fcntl
-except ImportError:
+except ModuleNotFoundError:
     fcntl = None
 
 def resolve_dotted_attribute(obj, attr, allow_dotted_names=True):

Lib/zipfile.py

@@ -18,18 +18,18 @@
 try:
     import zlib # We may need its compression method
     crc32 = zlib.crc32
-except ImportError:
+except ModuleNotFoundError:
     zlib = None
     crc32 = binascii.crc32
 
 try:
     import bz2 # We may need its compression method
-except ImportError:
+except ModuleNotFoundError:
     bz2 = None
 
 try:
     import lzma # We may need its compression method
-except ImportError:
+except ModuleNotFoundError:
     lzma = None
 
 __all__ = ["BadZipFile", "BadZipfile", "error",