diff -r ea4c74cc4da5 Lib/pydoc.py
--- a/Lib/pydoc.py	Mon Feb 17 10:54:30 2014 +0100
+++ b/Lib/pydoc.py	Mon Feb 17 21:58:30 2014 +0800
@@ -1244,9 +1244,12 @@
                         doc = getdoc(value)
                     else:
                         doc = None
-                    push(self.docother(
-                        getattr(object, name, None) or homecls.__dict__[name],
-                        name, mod, maxlen=70, doc=doc) + '\n')
+                    try:
+                        obj = getattr(object, name)
+                    except AttributeError:
+                        obj = homecls.__dict__[name]
+                    push(self.docother(obj, name, mod, maxlen=70, doc=doc) +
+                         '\n')
             return attrs
 
         attrs = [(name, kind, cls, value)
diff -r ea4c74cc4da5 Lib/test/test_pydoc.py
--- a/Lib/test/test_pydoc.py	Mon Feb 17 10:54:30 2014 +0100
+++ b/Lib/test/test_pydoc.py	Mon Feb 17 21:58:30 2014 +0800
@@ -386,6 +386,12 @@
             print_diffs(expected_text, result)
             self.fail("outputs are not equal, see diff above")
 
+    def test_text_enum_member_with_value_zero(self):
+        # Test issue #20654 to ensure enum member with value 0 can be
+        # displayed. It used to throw KeyError: 'AF_UNSPEC'.
+        result = run_pydoc('socket.AddressFamily', _isolated='False')
+        self.assertIn(b'<AddressFamily.AF_UNSPEC: 0>', result)
+
     def test_issue8225(self):
         # Test issue8225 to ensure no doc link appears for xml.etree
         result, doc_loc = get_pydoc_text(xml.etree)