custom-set: Corrected Function Names to match Test (#1590)

Fixes #1589
exercism · Nov 13, 2018 · e6ed992 · e6ed992
1 parent a917fb1
commit e6ed992
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/exercises/custom-set/custom_set.py b/exercises/custom-set/custom_set.py
@@ -23,8 +23,8 @@ def add(self, element):
     def intersection(self, other):
         pass
 
-    def difference(self, other):
+    def __sub__(self, other):
         pass
 
-    def union(self, other):
+    def __add__(self, other):
         pass