In PathFinder.invalidate_caches, also invoke MetadataPathFinder.invalidate_caches.

Author: jaraco

Lib/importlib/_bootstrap_external.py

@@ -1470,6 +1470,9 @@ def invalidate_caches():
         # https://bugs.python.org/issue45703
         _NamespacePath._epoch += 1
 
+        from importlib.metadata import MetadataPathFinder
+        MetadataPathFinder().invalidate_caches()
+
     @staticmethod
     def _path_hooks(path):
         """Search sys.path_hooks for a finder for 'path'."""