Don't go to definition of builtin modules

pyls/plugins/definition.py

@@ -20,6 +20,14 @@ def pyls_definitions(config, document, position):
                 'end': {'line': d.line - 1, 'character': d.column + len(d.name)},
             }
         }
-        for d in definitions
-        if d.is_definition() and d.line is not None and d.column is not None and d.module_path is not None
+        for d in definitions if d.is_definition() and _not_internal_definition(d)
     ]
+
+
+def _not_internal_definition(definition):
+    return (
+        definition.line is not None and
+        definition.column is not None and
+        definition.module_path is not None and
+        not definition.in_builtin_module()
+    )

test/plugins/test_definitions.py

@@ -40,7 +40,7 @@ def test_builtin_definition(config):
 
     # No go-to def for builtins
     doc = Document(DOC_URI, DOC)
-    assert len(pyls_definitions(config, doc, cursor_pos)) == 1
+    assert not pyls_definitions(config, doc, cursor_pos)
 
 
 def test_assignment(config):