Disambiguate between lambdas and regular functions

Author: mgedmin

objgraph.py

@@ -954,7 +954,8 @@ def _short_repr(obj):
             return name + ' (bound)'
         else:
             return name
-    if _isinstance(obj, types.LambdaType):
+    # NB: types.LambdaType is an alias for types.FunctionType!
+    if _isinstance(obj, types.LambdaType) and obj.__name__ == '<lambda>':
         return 'lambda: %s:%s' % (os.path.basename(obj.__code__.co_filename),
                                   obj.__code__.co_firstlineno)
     if _isinstance(obj, types.FrameType):

tests.py

@@ -428,6 +428,14 @@ def test_short_repr_lambda(self):
         self.assertEqual('lambda: tests.py:%s' % lambda_lineno,
                          objgraph._short_repr(f))
 
+    def test_short_repr_function(self):
+        self.assertRegex(objgraph._short_repr(sample_func),
+                         'function sample_func at .*')
+
+
+def sample_func():
+    pass
+
 
 class StubSubprocess(object):