[fix] do not call signature(obj) for non-callables. signature, will check and raise a exception where the message will contain obj.__repr__ and that can be very expensive on certain objects.

zolyfarkas-fb · zolyfarkas-fb · commit e3c35a8285af · 2023-10-17T16:12:05.000-04:00
diff --git a/IPython/core/oinspect.py b/IPython/core/oinspect.py
@@ -416,6 +416,8 @@ def _getdef(self,obj,oname='') -> Union[str,None]:
 
         If any exception is generated, None is returned instead and the
         exception is suppressed."""
+        if not callable(obj):
+            return None        
         try:
             return _render_signature(signature(obj), oname)
         except:
