Python 3: Fix search for bound methods

Signed-off-by: Fadi Moukayed <smfadi@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

1 files changed, 5 insertions, 1 deletions

diff --git a/ryu/controller/handler.py b/ryu/controller/handler.py
index b3d40aed..a0782a12 100644
--- a/ryu/controller/handler.py
+++ b/ryu/controller/handler.py
@@ -86,9 +86,13 @@ def register_instance(i):
                 i.register_handler(ev_cls, m)
 
 
+def _is_method(f):
+    return inspect.isfunction(f) or inspect.ismethod(f)
+
+
 def get_dependent_services(cls):
     services = []
-    for _k, m in inspect.getmembers(cls, inspect.ismethod):
+    for _k, m in inspect.getmembers(cls, _is_method):
         if _has_caller(m):
             for ev_cls, c in m.callers.items():
                 service = getattr(sys.modules[ev_cls.__module__],