Prevent an error when inspect.isabstract() is called with something else than a new-style class.

amaury.forgeotdarc · amaury.forgeotdarc · commit 6b19ff7b7380 · 2008-04-08T21:51:57.000Z
git-svn-id: http://svn.python.org/projects/python/trunk@62230 6015fed2-1504-0410-9fe1-9d1591cc4771
diff --git a/Lib/inspect.py b/Lib/inspect.py
@@ -247,7 +247,7 @@ def isgenerator(object):
 
 def isabstract(object):
     """Return true if the object is an abstract base class (ABC)."""
-    return object.__flags__ & TPFLAGS_IS_ABSTRACT
+    return isinstance(object, type) and object.__flags__ & TPFLAGS_IS_ABSTRACT
 
 def getmembers(object, predicate=None):
     """Return all members of an object as (name, value) pairs sorted by name.
