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Add set.isdisjoint()

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This commit is contained in:
Raymond Hettinger 2007-11-08 02:52:43 +00:00
parent 004c1c1562
commit 1760c8a017
4 changed files with 126 additions and 2 deletions
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49
Lib/test/test_set.py
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@ -102,6 +102,20 @@ class TestJointOps(unittest.TestCase):
self.assertEqual(self.thetype('abcba').intersection(C('ccb')), set('bc'))
self.assertEqual(self.thetype('abcba').intersection(C('ef')), set(''))
def test_isdisjoint(self):
def f(s1, s2):
'Pure python equivalent of isdisjoint()'
return not set(s1).intersection(s2)
for larg in '', 'a', 'ab', 'abc', 'ababac', 'cdc', 'cc', 'efgfe', 'ccb', 'ef':
s1 = self.thetype(larg)
for rarg in '', 'a', 'ab', 'abc', 'ababac', 'cdc', 'cc', 'efgfe', 'ccb', 'ef':
for C in set, frozenset, dict.fromkeys, str, unicode, list, tuple:
s2 = C(rarg)
actual = s1.isdisjoint(s2)
expected = f(s1, s2)
self.assertEqual(actual, expected)
self.assert_(actual is True or actual is False)
def test_and(self):
i = self.s.intersection(self.otherword)
self.assertEqual(self.s & set(self.otherword), i)
@ -657,6 +671,18 @@ class TestBasicOps(unittest.TestCase):
result = empty_set & self.set
self.assertEqual(result, empty_set)
def test_self_isdisjoint(self):
result = self.set.isdisjoint(self.set)
self.assertEqual(result, not self.set)
def test_empty_isdisjoint(self):
result = self.set.isdisjoint(empty_set)
self.assertEqual(result, True)
def test_isdisjoint_empty(self):
result = empty_set.isdisjoint(self.set)
self.assertEqual(result, True)
def test_self_symmetric_difference(self):
result = self.set ^ self.set
self.assertEqual(result, empty_set)
@ -835,6 +861,22 @@ class TestBinaryOps(unittest.TestCase):
result = self.set & set([8])
self.assertEqual(result, empty_set)
def test_isdisjoint_subset(self):
result = self.set.isdisjoint(set((2, 4)))
self.assertEqual(result, False)
def test_isdisjoint_superset(self):
result = self.set.isdisjoint(set([2, 4, 6, 8]))
self.assertEqual(result, False)
def test_isdisjoint_overlap(self):
result = self.set.isdisjoint(set([3, 4, 5]))
self.assertEqual(result, False)
def test_isdisjoint_non_overlap(self):
result = self.set.isdisjoint(set([8]))
self.assertEqual(result, True)
def test_sym_difference_subset(self):
result = self.set ^ set((2, 4))
self.assertEqual(result, set([6]))
@ -1456,11 +1498,14 @@ class TestVariousIteratorArgs(unittest.TestCase):
def test_inline_methods(self):
s = set('november')
for data in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5), 'december'):
for meth in (s.union, s.intersection, s.difference, s.symmetric_difference):
for meth in (s.union, s.intersection, s.difference, s.symmetric_difference, s.isdisjoint):
for g in (G, I, Ig, L, R):
expected = meth(data)
actual = meth(G(data))
self.assertEqual(sorted(actual), sorted(expected))
if isinstance(expected, bool):
self.assertEqual(actual, expected)
else:
self.assertEqual(sorted(actual), sorted(expected))
self.assertRaises(TypeError, meth, X(s))
self.assertRaises(TypeError, meth, N(s))
self.assertRaises(ZeroDivisionError, meth, E(s))