python/builtins.py

@@ -85,18 +85,18 @@ def dir(obj=None):
     if obj is None:
         return list(globals().keys())
     
-    attributes = set()
-    
-    if not isinstance(obj, type):
     if hasattr(obj, "__dir__"):
-            return sorted(obj.__dir__())
-        attributes.update(dir(type(obj)))
+        return obj.__dir__()
     
+    attributes = set()
+    # Set object attributes.
     if hasattr(obj, "__dict__"):
         attributes.update(obj.__dict__.keys())
     
-    if hasattr(obj, "__base__") and obj.__base__ is not None:
-        attributes.update(dir(obj.__base__))
+    # Set type attributes.
+    if not isinstance(obj, type):
+        if hasattr(type(obj), "__dict__"):
+            attributes.update(type(obj).__dict__.keys())
     
     return sorted(attributes)
 

tests/70_builtins.py

@@ -50,19 +50,3 @@ assert not all([False, False])
 
 assert list(enumerate([1,2,3])) == [(0,1), (1,2), (2,3)]
 assert list(enumerate([1,2,3], 1)) == [(1,1), (2,2), (3,3)]
-
-assert "__name__" in dir()
-
-class Base:
-    def inherited(): ...
-
-class Test(Base):
-    cls_attr = 'a'
-    def __init__(self):
-        self.self_attr = 1
-assert {"self_attr", "cls_attr", "inherited"}.issubset(dir(Test()))
-
-class CustomDir:
-    def __dir__(self):
-        return ["custom"]
-assert ["custom"] == dir(CustomDir())