.

mypy/build.py

@@ -91,7 +91,6 @@
 from mypy.renaming import LimitedVariableRenameVisitor, VariableRenameVisitor
 from mypy.stats import dump_type_stats
 from mypy.stubinfo import (
-    is_legacy_bundled_package,
     legacy_bundled_packages,
     non_bundled_packages,
     stub_distribution_name,
@@ -2672,7 +2671,10 @@ def find_module_and_diagnose(
         # negatives. (Unless there are stubs but they are incomplete.)
         global_ignore_missing_imports = manager.options.ignore_missing_imports
         if (
-            any(".".join(id_components[:i]) in legacy_bundled_packages for i in range(len(id_components), 0, -1))
+            any(
+                ".".join(id_components[:i]) in legacy_bundled_packages
+                for i in range(len(id_components), 0, -1)
+            )
             and global_ignore_missing_imports
             and not options.ignore_missing_imports_per_module
             and result is ModuleNotFoundReason.APPROVED_STUBS_NOT_INSTALLED

test-data/unit/check-modules.test

@@ -3138,9 +3138,11 @@ import bleach.xyz
 from bleach.abc import fgh
 [file bleach/__init__.pyi]
 [out]
-main:1: error: Cannot find implementation or library stub for module named "bleach.xyz"
+main:1: error: Library stubs not installed for "bleach.xyz"
+main:1: note: Hint: "python3 -m pip install types-bleach"
+main:1: note: (or run "mypy --install-types" to install all missing stub packages)
 main:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
-main:2: error: Cannot find implementation or library stub for module named "bleach.abc"
+main:2: error: Library stubs not installed for "bleach.abc"
 
 [case testMissingSubmoduleOfInstalledStubPackageIgnored]
 # flags: --ignore-missing-imports