Let set.intersection() and set.intersection_update() take multiple input arguments.
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index 37a085c..729cc3b 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -103,6 +103,7 @@
self.assertEqual(self.thetype('abcba').intersection(C('efgfe')), set(''))
self.assertEqual(self.thetype('abcba').intersection(C('ccb')), set('bc'))
self.assertEqual(self.thetype('abcba').intersection(C('ef')), set(''))
+ self.assertEqual(self.thetype('abcba').intersection(C('cbcf'), C('bag')), set('b'))
def test_isdisjoint(self):
def f(s1, s2):
@@ -429,6 +430,11 @@
s = self.thetype('abcba')
self.assertEqual(s.intersection_update(C(p)), None)
self.assertEqual(s, set(q))
+ ss = 'abcba'
+ s = self.thetype(ss)
+ t = 'cbc'
+ self.assertEqual(s.intersection_update(C(p), C(t)), None)
+ self.assertEqual(s, set('abcba')&set(p)&set(t))
def test_iand(self):
self.s &= set(self.otherword)