diff --git a/IPython/core/completer.py b/IPython/core/completer.py
index f2428e8..da2a866 100644
--- a/IPython/core/completer.py
+++ b/IPython/core/completer.py
@@ -336,6 +336,7 @@ class Completer(Configurable):
         #io.rprint('Completer->attr_matches, txt=%r' % text) # dbg
         # Another option, seems to work great. Catches things like ''.<tab>
         m = re.match(r"(\S+(\.\w+)*)\.(\w*)$", text)
+    
         if m:
             expr, attr = m.group(1, 3)
         elif self.greedy:
@@ -345,7 +346,7 @@ class Completer(Configurable):
             expr, attr = m2.group(1,2)
         else:
             return []
-        
+    
         try:
             obj = eval(expr, self.namespace)
         except:
diff --git a/IPython/core/tests/test_completer.py b/IPython/core/tests/test_completer.py
index 2f9ea48..ab2c7b6 100644
--- a/IPython/core/tests/test_completer.py
+++ b/IPython/core/tests/test_completer.py
@@ -18,7 +18,6 @@ from IPython.core import completer
 from IPython.external.decorators import knownfailureif
 from IPython.utils.tempdir import TemporaryDirectory
 from IPython.utils.generics import complete_object
-from IPython.testing.globalipapp import get_ipython
 
 #-----------------------------------------------------------------------------
 # Test functions
@@ -241,4 +240,4 @@ def test_get__all__entries_no__all__ok():
   class A(object):
       pass
   words = completer.get__all__entries(A())
-  nt.assert_equal(words, [])
\ No newline at end of file
+  nt.assert_equal(words, [])
diff --git a/IPython/utils/tests/test_dir2.py b/IPython/utils/tests/test_dir2.py
new file mode 100644
index 0000000..c06e982
--- /dev/null
+++ b/IPython/utils/tests/test_dir2.py
@@ -0,0 +1,51 @@
+import nose.tools as nt
+from IPython.utils.dir2 import dir2
+
+
+class Base(object):
+    x = 1
+    z = 23
+
+
+def test_base():
+    res = dir2(Base())
+    assert ('x' in res)
+    assert ('z' in res)
+    assert ('y' not in res)
+    assert ('__class__' in res)
+    nt.assert_equal(res.count('x'), 2)  # duplicates
+    nt.assert_equal(res.count('__class__'), 4) # duplicates
+
+def test_SubClass():
+
+    class SubClass(Base):
+        y = 2
+
+    res = dir2(SubClass())
+    assert ('y' in res)
+    nt.assert_equal(res.count('y'), 2) # duplicates,
+    nt.assert_equal(res.count('x'), 3) # duplicates, but fewer than above!
+
+
+def test_SubClass_with_trait_names_method():
+
+    class SubClass(Base):
+        y = 2
+        def trait_names(self):
+            return ['t', 'umbrella']
+
+    res = dir2(SubClass())
+    assert('trait_names' in res)
+    assert('umbrella' in res)
+    nt.assert_equal(res.count('t'), 1)
+
+
+def test_SubClass_with_trait_names_attr():
+    # usecase: trait_names is used in a class describing psychological classification
+
+    class SubClass(Base):
+        y = 2
+        trait_names = 44
+
+    res = dir2(SubClass())
+    assert('trait_names' in res)