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Multi-arg form for set.difference() and set.difference_update().

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Raymond Hettinger 2008-06-11 10:30:54 +00:00
parent 9d53457e59
commit 4267be6478
4 changed files with 66 additions and 21 deletions
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14
Lib/test/test_set.py
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@ -149,6 +149,8 @@ class TestJointOps(unittest.TestCase):
self.assertEqual(self.thetype('abcba').difference(C('efgfe')), set('abc'))
self.assertEqual(self.thetype('abcba').difference(C('ccb')), set('a'))
self.assertEqual(self.thetype('abcba').difference(C('ef')), set('abc'))
self.assertEqual(self.thetype('abcba').difference(), set('abc'))
self.assertEqual(self.thetype('abcba').difference(C('a'), C('b')), set('c'))
def test_sub(self):
i = self.s.difference(self.otherword)
@ -467,6 +469,18 @@ class TestSet(TestJointOps):
self.assertEqual(s.difference_update(C(p)), None)
self.assertEqual(s, set(q))
s = self.thetype('abcdefghih')
s.difference_update()
self.assertEqual(s, self.thetype('abcdefghih'))
s = self.thetype('abcdefghih')
s.difference_update(C('aba'))
self.assertEqual(s, self.thetype('cdefghih'))
s = self.thetype('abcdefghih')
s.difference_update(C('cdc'), C('aba'))
self.assertEqual(s, self.thetype('efghih'))
def test_isub(self):
self.s -= set(self.otherword)
for c in (self.word + self.otherword):