Petr's notes

Author: StanFromIreland

Lib/test/test_traceback.py

@@ -5064,7 +5064,7 @@ def test_missing_stdlib_module(self):
         code = """
             import sys
             import traceback
-            traceback.MISSING_STDLIB_MODULE_MESSAGES = {'spam': "Install 'spam4life' for 'spam'"}
+            traceback._MISSING_STDLIB_MODULE_MESSAGES = {'spam': "Install 'spam4life' for 'spam'"}
             sys.stdlib_module_names |= {'spam'}
             import spam
         """

Lib/traceback.py

@@ -15,9 +15,9 @@
 from contextlib import suppress
 
 try:
-    from _missing_stdlib_info import MISSING_STDLIB_MODULE_MESSAGES
+    from _missing_stdlib_info import _MISSING_STDLIB_MODULE_MESSAGES
 except ImportError:
-    MISSING_STDLIB_MODULE_MESSAGES = {}
+    _MISSING_STDLIB_MODULE_MESSAGES = {}
 
 __all__ = ['extract_stack', 'extract_tb', 'format_exception',
            'format_exception_only', 'format_list', 'format_stack',
@@ -1115,7 +1115,7 @@ def __init__(self, exc_type, exc_value, exc_traceback, *, limit=None,
         elif exc_type and issubclass(exc_type, ModuleNotFoundError):
             module_name = getattr(exc_value, "name", None)
             if module_name in sys.stdlib_module_names:
-                message = MISSING_STDLIB_MODULE_MESSAGES.get(
+                message = _MISSING_STDLIB_MODULE_MESSAGES.get(
                     module_name,
                     f"Standard library module {module_name!r} was not found"
                 )

Tools/build/check_extension_modules.py

@@ -302,7 +302,7 @@ def generate_missing_stdlib_info(self, config_path: str | None = None) -> None:
                 with open(config_path, encoding='utf-8') as f:
                     config_messages = json.load(f)
             except (FileNotFoundError, json.JSONDecodeError) as e:
-                raise RuntimeError("Failed to load missing stdlib config %s: %s", config_path, e)
+                raise RuntimeError(f"Failed to load missing stdlib config {config_path!r}") from e
 
         messages = {}
         for name in WINDOWS_MODULES:
@@ -321,7 +321,7 @@ def generate_missing_stdlib_info(self, config_path: str | None = None) -> None:
 # ModuleNotFound error messages.
 # Generated by check_extension_modules.py
 
-MISSING_STDLIB_MODULE_MESSAGES = {pprint.pformat(messages)}
+_MISSING_STDLIB_MODULE_MESSAGES = {pprint.pformat(messages)}
 '''
 
         output_path = self.builddir / "_missing_stdlib_info.py"