Filter excess entries

CHANGES.rst

@@ -1,3 +1,10 @@
+v6.2.1
+======
+
+* #442: Fixed issue introduced in v6.1.0 where non-importable
+  names (metadata dirs) began appearing in
+  ``packages_distributions``.
+
 v6.2.0
 ======
 

importlib_metadata/__init__.py

@@ -902,4 +902,9 @@ def _top_level_inferred(dist):
         f.parts[0] if len(f.parts) > 1 else inspect.getmodulename(f)
         for f in always_iterable(dist.files)
     }
-    return filter(None, opt_names)
+
+    @pass_none
+    def importable_name(name):
+        return '.' not in name
+
+    return filter(importable_name, opt_names)

tests/test_main.py

@@ -335,11 +335,12 @@ def test_packages_distributions_all_module_types(self):
                         Name: all_distributions
                         Version: 1.0.0
                     """,
-                    'RECORD': ''.join(
-                        f'{i}-top-level{suffix},,\n'
-                        f'{i}-in-namespace/mod{suffix},,\n'
-                        f'{i}-in-package/__init__.py,,\n'
-                        f'{i}-in-package/mod{suffix},,\n'
+                    'RECORD': 'all_distributions-1.0.0.dist-info/METADATA\n'
+                    + ''.join(
+                        f'importable-name {i}{suffix},,\n'
+                        f'in_namespace_{i}/mod{suffix},,\n'
+                        f'in_package_{i}/__init__.py,,\n'
+                        f'in_package_{i}/mod{suffix},,\n'
                         for i, suffix in enumerate(suffixes)
                     ),
                 },
@@ -350,6 +351,8 @@ def test_packages_distributions_all_module_types(self):
         distributions = packages_distributions()
 
         for i in range(len(suffixes)):
-            assert distributions[f'{i}-top-level'] == ['all_distributions']
-            assert distributions[f'{i}-in-namespace'] == ['all_distributions']
-            assert distributions[f'{i}-in-package'] == ['all_distributions']
+            assert distributions[f'importable-name {i}'] == ['all_distributions']
+            assert distributions[f'in_namespace_{i}'] == ['all_distributions']
+            assert distributions[f'in_package_{i}'] == ['all_distributions']
+
+        assert not any(name.endswith('.dist-info') for name in distributions)