opentelemetry-api: avoid SelectableGroups dict API

.changelog/5234.fixed

@@ -0,0 +1 @@
+`opentelemetry-api`: avoid deprecated `SelectableGroups` dict access.

opentelemetry-api/src/opentelemetry/util/_importlib_metadata.py

@@ -28,6 +28,8 @@
 def _as_entry_points(eps: Any) -> EntryPoints:
     if isinstance(eps, EntryPoints):
         return eps
+    if hasattr(eps, "select"):
+        return eps.select()
     # Handle Python 3.10 SelectableGroups (dict-like)
     return EntryPoints(ep for group_eps in eps.values() for ep in group_eps)
 

opentelemetry-api/tests/util/test__importlib_metadata.py

@@ -117,3 +117,18 @@ def test_as_entry_points_selectable_groups_compat(self):
         self.assertIsInstance(normalized, EntryPoints)
         self.assertEqual(len(normalized), 2)
         self.assertEqual(list(normalized), [ep1, ep2])
+
+    def test_as_entry_points_uses_selectable_groups_select(self):
+        """Test that SelectableGroups are normalized without the deprecated dict API."""
+        entry_point = EntryPoint(name="foo", value="bar:baz", group="gp")
+
+        class SelectableGroups:
+            def select(self):
+                return EntryPoints([entry_point])
+
+            def values(self):
+                raise AssertionError("deprecated dict interface used")
+
+        normalized = _as_entry_points(SelectableGroups())
+        self.assertIsInstance(normalized, EntryPoints)
+        self.assertEqual(list(normalized), [entry_point])