Function_elementof: Remove use of is_Set

sagemath · Jun 9, 2021 · 5310e04 · 5310e04
1 parent 9b4e224
commit 5310e04
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/sage/functions/other.py b/src/sage/functions/other.py
@@ -2329,8 +2329,8 @@ def _eval_(self, x, s):
             ...
             ValueError: not a set: 0
         """
-        from sage.sets.set import is_Set
-        if not is_Set(s):
+        from sage.sets.sets_cat import Sets
+        if not s in Sets():
             raise ValueError("not a set: {}".format(s))
 
     def _latex_(self):