https://bugs.gentoo.org/942871
https://github.com/torproject/nyx/issues/74
--- a/nyx/panel/__init__.py
+++ b/nyx/panel/__init__.py
@@ -78,7 +78,7 @@
       is_match = self._key_func(key) if self._key_func else key.match(self.key)
 
       if is_match:
-        if inspect.getargspec(self._action).args == ['key']:
+        if inspect.getfullargspec(self._action).args == ['key']:
           self._action(key)
         else:
           self._action()
