No extract_node directly into astroid.

pylint/extensions/_check_docs_utils.py

@@ -69,7 +69,7 @@ def possible_exc_types(node):
         if handler and handler.type:
             excs = astroid.unpack_infer(handler.type)
-            excs = (exc.name for exc in excs if exc is not astroid.Uninferable)
+            excs = (exc.name for exc in excs if exc is not astroid.YES)
     excs = set(exc for exc in excs if not node_ignores_exception(node, exc))
     return excs

pylint/test/extensions/test_check_docs_utils.py

@@ -126,7 +126,7 @@ class PossibleExcTypesText(unittest.TestCase):
         self.assertEqual(found, expected)
     def test_ignores_uninferable_type(self):
-        raise_node = astroid.extract_node('''
+        raise_node = test_utils.extract_node('''
         import not_a_module
         def my_func():
             try: