From c01925dce37479fdfb49c171ddc1d7850cb6a86f Mon Sep 17 00:00:00 2001
From: Locked-chess-official <13140752715@163.com>
Date: Thu, 26 Mar 2026 00:06:10 +0800
Subject: [PATCH 1/5] just change traceback.py to make it

---
 Lib/traceback.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/traceback.py b/Lib/traceback.py
index 1f9f151ebf5d39..bb57e812283efa 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -1755,7 +1755,7 @@ def _compute_suggestion_error(exc_value, tb, wrong_name):
                 parent = importlib.util.find_spec(parent_name)
             else:
                 parent = None
-            d = []
+            d = list(sys.builtin_module_names)
             for finder in sys.meta_path:
                 if discover := getattr(finder, 'discover', None):
                     d += [spec.name for spec in discover(parent)]

From b57a7e7b75048c5736418370f14749487a007dff Mon Sep 17 00:00:00 2001
From: Locked-chess-official <13140752715@163.com>
Date: Thu, 26 Mar 2026 15:59:09 +0800
Subject: [PATCH 2/5] add test (why who added the suggestion for module name
 didn't add the traceback test?)

---
 Lib/test/test_traceback.py | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Lib/test/test_traceback.py b/Lib/test/test_traceback.py
index 5dc11253e0d5c8..b4ab39a869113a 100644
--- a/Lib/test/test_traceback.py
+++ b/Lib/test/test_traceback.py
@@ -5004,6 +5004,26 @@ def func():
         actual = self.get_suggestion(func)
         self.assertIn("forget to import '_io'", actual)
 
+    def test_import_builtin_module_typo_suggestion(self):
+        def func():
+            import itertool # noqa: F401
+
+        actual = self.get_suggestion(func)
+        self.assertIn("Did you mean: 'itertools'?", actual)
+
+    def test_import_file_module_typo_suggestion(self):
+        def func():
+            import abs # noqa: F401
+
+        actual = self.get_suggestion(func)
+        self.assertIn("Did you mean: 'abc'?", actual)
+
+    def test_import_submodule_typo_suggestion(self):
+        def func():
+            import multiprocessing.dumy # noqa: F401
+
+        actual = self.get_suggestion(func)
+        self.assertIn("Did you mean: 'multiprocessing.dummy'?", actual)
 
 
 class PurePythonSuggestionFormattingTests(

From 03a92905f77b6c34695398af3173cb4d5a99bcec Mon Sep 17 00:00:00 2001
From: Locked-chess-official <13140752715@163.com>
Date: Thu, 2 Apr 2026 19:47:27 +0800
Subject: [PATCH 3/5] Revert "just change traceback.py to make it"

This reverts commit c01925dce37479fdfb49c171ddc1d7850cb6a86f.

 Changes to be committed:
	modified:   Lib/traceback.py
---
 Lib/traceback.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/traceback.py b/Lib/traceback.py
index bb57e812283efa..1f9f151ebf5d39 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -1755,7 +1755,7 @@ def _compute_suggestion_error(exc_value, tb, wrong_name):
                 parent = importlib.util.find_spec(parent_name)
             else:
                 parent = None
-            d = list(sys.builtin_module_names)
+            d = []
             for finder in sys.meta_path:
                 if discover := getattr(finder, 'discover', None):
                     d += [spec.name for spec in discover(parent)]

From a06d51a138624491b6d55d320f1c0059e190a1cf Mon Sep 17 00:00:00 2001
From: Locked-chess-official <13140752715@163.com>
Date: Thu, 2 Apr 2026 19:54:11 +0800
Subject: [PATCH 4/5] revert change in traceback and add discover

---
 Lib/importlib/_bootstrap.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
index 45beb51659f5b7..eaf7d547b65efa 100644
--- a/Lib/importlib/_bootstrap.py
+++ b/Lib/importlib/_bootstrap.py
@@ -938,6 +938,14 @@ def is_package(cls, fullname):
         """Return False as built-in modules are never packages."""
         return False
 
+    @classmethod
+    def discover(cls, spec=None):
+        if spec is not None: # assume that built-in modules have no submodule
+            return
+        for i in sys.builtin_module_names:
+            if i_spec := cls.find_spec(i):
+                yield i_spec
+
 
 class FrozenImporter:
 

From 16210183196fffad23917b3df6bde9e235e79957 Mon Sep 17 00:00:00 2001
From: Locked-chess-official <13140752715@163.com>
Date: Thu, 2 Apr 2026 20:41:41 +0800
Subject: [PATCH 5/5] Update Lib/importlib/_bootstrap.py

Co-authored-by: Victor Stinner <vstinner@python.org>
---
 Lib/importlib/_bootstrap.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
index eaf7d547b65efa..3f4170f7b1cfdd 100644
--- a/Lib/importlib/_bootstrap.py
+++ b/Lib/importlib/_bootstrap.py
@@ -942,9 +942,9 @@ def is_package(cls, fullname):
     def discover(cls, spec=None):
         if spec is not None: # assume that built-in modules have no submodule
             return
-        for i in sys.builtin_module_names:
-            if i_spec := cls.find_spec(i):
-                yield i_spec
+        for name in sys.builtin_module_names:
+            if mod_spec := cls.find_spec(name):
+                yield mod_spec
 
 
 class FrozenImporter: