Hopefully resolving one final issue

restrictedpython_code_eval.py

@@ -46,6 +46,9 @@ from RestrictedPython.Eval import default_guarded_getiter, default_guarded_getit
 from RestrictedPython.Guards import guarded_iter_unpack_sequence, safer_getattr, guarded_unpack_sequence
 
 
+SAFE_ATTRIBUTES = ['__add__', '__ge__', '__gt__', '__le__', '__lt__', '__mul__', '__ne__', '__rmul__', '__str__',]
+
+
 # patch their list implementation to allow empty lists and tuples
 def limited_list(seq=None):
     if isinstance(seq, str):
@@ -54,6 +57,11 @@ def limited_list(seq=None):
     return list(seq) if seq is not None else list()
 
 
+for attr in SAFE_ATTRIBUTES:
+    if hasattr(list, attr):
+        setattr(limited_list, attr, getattr(list, attr))
+
+
 limited_builtins['list'] = limited_list
 
 
@@ -64,6 +72,11 @@ def limited_tuple(seq=None):
     return tuple(seq) if seq is not None else tuple()
 
 
+for attr in SAFE_ATTRIBUTES:
+    if hasattr(tuple, attr):
+        setattr(limited_tuple, attr, getattr(tuple, attr))
+
+
 limited_builtins['tuple'] = limited_tuple