Fix bug related to options.keys

mathics · Jun 6, 2017 · 3581622 · 3581622
1 parent ebf6a0d
commit 3581622
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/mathics/builtin/lists.py b/mathics/builtin/lists.py
@@ -4688,7 +4688,7 @@ class ContainsOnly(Builtin):
     }
 
     def check_options(self, expr, evaluation, options):
-        for key in options.keys():
+        for key in options:
             if key != 'System`SameTest':
                 if expr is None:
                     evaluation.message('ContainsOnly', 'nodef', Symbol(key))