cpython/Lib/test/test_sets.py

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#!/usr/bin/env python
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import warnings
warnings.filterwarnings("ignore", "the sets module is deprecated",
DeprecationWarning, "test\.test_sets")
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import unittest, operator, copy, pickle, random
from sets import Set, ImmutableSet
from test import test_support
empty_set = Set()
#==============================================================================
class TestBasicOps(unittest.TestCase):
def test_repr(self):
if self.repr is not None:
self.assertEqual(repr(self.set), self.repr)
def test_length(self):
self.assertEqual(len(self.set), self.length)
def test_self_equality(self):
self.assertEqual(self.set, self.set)
def test_equivalent_equality(self):
self.assertEqual(self.set, self.dup)
def test_copy(self):
self.assertEqual(self.set.copy(), self.dup)
def test_self_union(self):
result = self.set | self.set
self.assertEqual(result, self.dup)
def test_empty_union(self):
result = self.set | empty_set
self.assertEqual(result, self.dup)
def test_union_empty(self):
result = empty_set | self.set
self.assertEqual(result, self.dup)
def test_self_intersection(self):
result = self.set & self.set
self.assertEqual(result, self.dup)
def test_empty_intersection(self):
result = self.set & empty_set
self.assertEqual(result, empty_set)
def test_intersection_empty(self):
result = empty_set & self.set
self.assertEqual(result, empty_set)
def test_self_symmetric_difference(self):
result = self.set ^ self.set
self.assertEqual(result, empty_set)
def checkempty_symmetric_difference(self):
result = self.set ^ empty_set
self.assertEqual(result, self.set)
def test_self_difference(self):
result = self.set - self.set
self.assertEqual(result, empty_set)
def test_empty_difference(self):
result = self.set - empty_set
self.assertEqual(result, self.dup)
def test_empty_difference_rev(self):
result = empty_set - self.set
self.assertEqual(result, empty_set)
def test_iteration(self):
for v in self.set:
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self.assertTrue(v in self.values)
def test_pickling(self):
p = pickle.dumps(self.set)
copy = pickle.loads(p)
self.assertEqual(self.set, copy,
"%s != %s" % (self.set, copy))
#------------------------------------------------------------------------------
class TestBasicOpsEmpty(TestBasicOps):
def setUp(self):
self.case = "empty set"
self.values = []
self.set = Set(self.values)
self.dup = Set(self.values)
self.length = 0
self.repr = "Set([])"
#------------------------------------------------------------------------------
class TestBasicOpsSingleton(TestBasicOps):
def setUp(self):
self.case = "unit set (number)"
self.values = [3]
self.set = Set(self.values)
self.dup = Set(self.values)
self.length = 1
self.repr = "Set([3])"
def test_in(self):
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self.assertTrue(3 in self.set)
def test_not_in(self):
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self.assertTrue(2 not in self.set)
#------------------------------------------------------------------------------
class TestBasicOpsTuple(TestBasicOps):
def setUp(self):
self.case = "unit set (tuple)"
self.values = [(0, "zero")]
self.set = Set(self.values)
self.dup = Set(self.values)
self.length = 1
self.repr = "Set([(0, 'zero')])"
def test_in(self):
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self.assertTrue((0, "zero") in self.set)
def test_not_in(self):
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self.assertTrue(9 not in self.set)
#------------------------------------------------------------------------------
class TestBasicOpsTriple(TestBasicOps):
def setUp(self):
self.case = "triple set"
self.values = [0, "zero", operator.add]
self.set = Set(self.values)
self.dup = Set(self.values)
self.length = 3
self.repr = None
#==============================================================================
def baditer():
raise TypeError
yield True
def gooditer():
yield True
class TestExceptionPropagation(unittest.TestCase):
"""SF 628246: Set constructor should not trap iterator TypeErrors"""
def test_instanceWithException(self):
self.assertRaises(TypeError, Set, baditer())
def test_instancesWithoutException(self):
# All of these iterables should load without exception.
Set([1,2,3])
Set((1,2,3))
Set({'one':1, 'two':2, 'three':3})
Set(xrange(3))
Set('abc')
Set(gooditer())
#==============================================================================
class TestSetOfSets(unittest.TestCase):
def test_constructor(self):
inner = Set([1])
outer = Set([inner])
element = outer.pop()
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self.assertEqual(type(element), ImmutableSet)
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outer.add(inner) # Rebuild set of sets with .add method
outer.remove(inner)
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self.assertEqual(outer, Set()) # Verify that remove worked
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outer.discard(inner) # Absence of KeyError indicates working fine
#==============================================================================
class TestBinaryOps(unittest.TestCase):
def setUp(self):
self.set = Set((2, 4, 6))
def test_eq(self): # SF bug 643115
self.assertEqual(self.set, Set({2:1,4:3,6:5}))
def test_union_subset(self):
result = self.set | Set([2])
self.assertEqual(result, Set((2, 4, 6)))
def test_union_superset(self):
result = self.set | Set([2, 4, 6, 8])
self.assertEqual(result, Set([2, 4, 6, 8]))
def test_union_overlap(self):
result = self.set | Set([3, 4, 5])
self.assertEqual(result, Set([2, 3, 4, 5, 6]))
def test_union_non_overlap(self):
result = self.set | Set([8])
self.assertEqual(result, Set([2, 4, 6, 8]))
def test_intersection_subset(self):
result = self.set & Set((2, 4))
self.assertEqual(result, Set((2, 4)))
def test_intersection_superset(self):
result = self.set & Set([2, 4, 6, 8])
self.assertEqual(result, Set([2, 4, 6]))
def test_intersection_overlap(self):
result = self.set & Set([3, 4, 5])
self.assertEqual(result, Set([4]))
def test_intersection_non_overlap(self):
result = self.set & Set([8])
self.assertEqual(result, empty_set)
def test_sym_difference_subset(self):
result = self.set ^ Set((2, 4))
self.assertEqual(result, Set([6]))
def test_sym_difference_superset(self):
result = self.set ^ Set((2, 4, 6, 8))
self.assertEqual(result, Set([8]))
def test_sym_difference_overlap(self):
result = self.set ^ Set((3, 4, 5))
self.assertEqual(result, Set([2, 3, 5, 6]))
def test_sym_difference_non_overlap(self):
result = self.set ^ Set([8])
self.assertEqual(result, Set([2, 4, 6, 8]))
def test_cmp(self):
a, b = Set('a'), Set('b')
self.assertRaises(TypeError, cmp, a, b)
# You can view this as a buglet: cmp(a, a) does not raise TypeError,
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# because __eq__ is tried before __cmp__, and a.__eq__(a) returns True,
# which Python thinks is good enough to synthesize a cmp() result
# without calling __cmp__.
self.assertEqual(cmp(a, a), 0)
self.assertRaises(TypeError, cmp, a, 12)
self.assertRaises(TypeError, cmp, "abc", a)
def test_inplace_on_self(self):
t = self.set.copy()
t |= t
self.assertEqual(t, self.set)
t &= t
self.assertEqual(t, self.set)
t -= t
self.assertEqual(len(t), 0)
t = self.set.copy()
t ^= t
self.assertEqual(len(t), 0)
#==============================================================================
class TestUpdateOps(unittest.TestCase):
def setUp(self):
self.set = Set((2, 4, 6))
def test_union_subset(self):
self.set |= Set([2])
self.assertEqual(self.set, Set((2, 4, 6)))
def test_union_superset(self):
self.set |= Set([2, 4, 6, 8])
self.assertEqual(self.set, Set([2, 4, 6, 8]))
def test_union_overlap(self):
self.set |= Set([3, 4, 5])
self.assertEqual(self.set, Set([2, 3, 4, 5, 6]))
def test_union_non_overlap(self):
self.set |= Set([8])
self.assertEqual(self.set, Set([2, 4, 6, 8]))
def test_union_method_call(self):
self.set.union_update(Set([3, 4, 5]))
self.assertEqual(self.set, Set([2, 3, 4, 5, 6]))
def test_intersection_subset(self):
self.set &= Set((2, 4))
self.assertEqual(self.set, Set((2, 4)))
def test_intersection_superset(self):
self.set &= Set([2, 4, 6, 8])
self.assertEqual(self.set, Set([2, 4, 6]))
def test_intersection_overlap(self):
self.set &= Set([3, 4, 5])
self.assertEqual(self.set, Set([4]))
def test_intersection_non_overlap(self):
self.set &= Set([8])
self.assertEqual(self.set, empty_set)
def test_intersection_method_call(self):
self.set.intersection_update(Set([3, 4, 5]))
self.assertEqual(self.set, Set([4]))
def test_sym_difference_subset(self):
self.set ^= Set((2, 4))
self.assertEqual(self.set, Set([6]))
def test_sym_difference_superset(self):
self.set ^= Set((2, 4, 6, 8))
self.assertEqual(self.set, Set([8]))
def test_sym_difference_overlap(self):
self.set ^= Set((3, 4, 5))
self.assertEqual(self.set, Set([2, 3, 5, 6]))
def test_sym_difference_non_overlap(self):
self.set ^= Set([8])
self.assertEqual(self.set, Set([2, 4, 6, 8]))
def test_sym_difference_method_call(self):
self.set.symmetric_difference_update(Set([3, 4, 5]))
self.assertEqual(self.set, Set([2, 3, 5, 6]))
def test_difference_subset(self):
self.set -= Set((2, 4))
self.assertEqual(self.set, Set([6]))
def test_difference_superset(self):
self.set -= Set((2, 4, 6, 8))
self.assertEqual(self.set, Set([]))
def test_difference_overlap(self):
self.set -= Set((3, 4, 5))
self.assertEqual(self.set, Set([2, 6]))
def test_difference_non_overlap(self):
self.set -= Set([8])
self.assertEqual(self.set, Set([2, 4, 6]))
def test_difference_method_call(self):
self.set.difference_update(Set([3, 4, 5]))
self.assertEqual(self.set, Set([2, 6]))
#==============================================================================
class TestMutate(unittest.TestCase):
def setUp(self):
self.values = ["a", "b", "c"]
self.set = Set(self.values)
def test_add_present(self):
self.set.add("c")
self.assertEqual(self.set, Set("abc"))
def test_add_absent(self):
self.set.add("d")
self.assertEqual(self.set, Set("abcd"))
def test_add_until_full(self):
tmp = Set()
expected_len = 0
for v in self.values:
tmp.add(v)
expected_len += 1
self.assertEqual(len(tmp), expected_len)
self.assertEqual(tmp, self.set)
def test_remove_present(self):
self.set.remove("b")
self.assertEqual(self.set, Set("ac"))
def test_remove_absent(self):
try:
self.set.remove("d")
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self.fail("Removing missing element should have raised LookupError")
except LookupError:
pass
def test_remove_until_empty(self):
expected_len = len(self.set)
for v in self.values:
self.set.remove(v)
expected_len -= 1
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self.assertEqual(len(self.set), expected_len)
def test_discard_present(self):
self.set.discard("c")
self.assertEqual(self.set, Set("ab"))
def test_discard_absent(self):
self.set.discard("d")
self.assertEqual(self.set, Set("abc"))
def test_clear(self):
self.set.clear()
self.assertEqual(len(self.set), 0)
def test_pop(self):
popped = {}
while self.set:
popped[self.set.pop()] = None
self.assertEqual(len(popped), len(self.values))
for v in self.values:
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self.assertTrue(v in popped)
def test_update_empty_tuple(self):
self.set.union_update(())
self.assertEqual(self.set, Set(self.values))
def test_update_unit_tuple_overlap(self):
self.set.union_update(("a",))
self.assertEqual(self.set, Set(self.values))
def test_update_unit_tuple_non_overlap(self):
self.set.union_update(("a", "z"))
self.assertEqual(self.set, Set(self.values + ["z"]))
#==============================================================================
class TestSubsets(unittest.TestCase):
case2method = {"<=": "issubset",
">=": "issuperset",
}
reverse = {"==": "==",
"!=": "!=",
"<": ">",
">": "<",
"<=": ">=",
">=": "<=",
}
def test_issubset(self):
x = self.left
y = self.right
for case in "!=", "==", "<", "<=", ">", ">=":
expected = case in self.cases
# Test the binary infix spelling.
result = eval("x" + case + "y", locals())
self.assertEqual(result, expected)
# Test the "friendly" method-name spelling, if one exists.
if case in TestSubsets.case2method:
method = getattr(x, TestSubsets.case2method[case])
result = method(y)
self.assertEqual(result, expected)
# Now do the same for the operands reversed.
rcase = TestSubsets.reverse[case]
result = eval("y" + rcase + "x", locals())
self.assertEqual(result, expected)
if rcase in TestSubsets.case2method:
method = getattr(y, TestSubsets.case2method[rcase])
result = method(x)
self.assertEqual(result, expected)
#------------------------------------------------------------------------------
class TestSubsetEqualEmpty(TestSubsets):
left = Set()
right = Set()
name = "both empty"
cases = "==", "<=", ">="
#------------------------------------------------------------------------------
class TestSubsetEqualNonEmpty(TestSubsets):
left = Set([1, 2])
right = Set([1, 2])
name = "equal pair"
cases = "==", "<=", ">="
#------------------------------------------------------------------------------
class TestSubsetEmptyNonEmpty(TestSubsets):
left = Set()
right = Set([1, 2])
name = "one empty, one non-empty"
cases = "!=", "<", "<="
#------------------------------------------------------------------------------
class TestSubsetPartial(TestSubsets):
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left = Set([1])
right = Set([1, 2])
name = "one a non-empty proper subset of other"
cases = "!=", "<", "<="
#------------------------------------------------------------------------------
class TestSubsetNonOverlap(TestSubsets):
left = Set([1])
right = Set([2])
name = "neither empty, neither contains"
cases = "!="
#==============================================================================
class TestOnlySetsInBinaryOps(unittest.TestCase):
def test_eq_ne(self):
# Unlike the others, this is testing that == and != *are* allowed.
self.assertEqual(self.other == self.set, False)
self.assertEqual(self.set == self.other, False)
self.assertEqual(self.other != self.set, True)
self.assertEqual(self.set != self.other, True)
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def test_ge_gt_le_lt(self):
self.assertRaises(TypeError, lambda: self.set < self.other)
self.assertRaises(TypeError, lambda: self.set <= self.other)
self.assertRaises(TypeError, lambda: self.set > self.other)
self.assertRaises(TypeError, lambda: self.set >= self.other)
self.assertRaises(TypeError, lambda: self.other < self.set)
self.assertRaises(TypeError, lambda: self.other <= self.set)
self.assertRaises(TypeError, lambda: self.other > self.set)
self.assertRaises(TypeError, lambda: self.other >= self.set)
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def test_union_update_operator(self):
try:
self.set |= self.other
except TypeError:
pass
else:
self.fail("expected TypeError")
def test_union_update(self):
if self.otherIsIterable:
self.set.union_update(self.other)
else:
self.assertRaises(TypeError, self.set.union_update, self.other)
def test_union(self):
self.assertRaises(TypeError, lambda: self.set | self.other)
self.assertRaises(TypeError, lambda: self.other | self.set)
if self.otherIsIterable:
self.set.union(self.other)
else:
self.assertRaises(TypeError, self.set.union, self.other)
def test_intersection_update_operator(self):
try:
self.set &= self.other
except TypeError:
pass
else:
self.fail("expected TypeError")
def test_intersection_update(self):
if self.otherIsIterable:
self.set.intersection_update(self.other)
else:
self.assertRaises(TypeError,
self.set.intersection_update,
self.other)
def test_intersection(self):
self.assertRaises(TypeError, lambda: self.set & self.other)
self.assertRaises(TypeError, lambda: self.other & self.set)
if self.otherIsIterable:
self.set.intersection(self.other)
else:
self.assertRaises(TypeError, self.set.intersection, self.other)
def test_sym_difference_update_operator(self):
try:
self.set ^= self.other
except TypeError:
pass
else:
self.fail("expected TypeError")
def test_sym_difference_update(self):
if self.otherIsIterable:
self.set.symmetric_difference_update(self.other)
else:
self.assertRaises(TypeError,
self.set.symmetric_difference_update,
self.other)
def test_sym_difference(self):
self.assertRaises(TypeError, lambda: self.set ^ self.other)
self.assertRaises(TypeError, lambda: self.other ^ self.set)
if self.otherIsIterable:
self.set.symmetric_difference(self.other)
else:
self.assertRaises(TypeError, self.set.symmetric_difference, self.other)
def test_difference_update_operator(self):
try:
self.set -= self.other
except TypeError:
pass
else:
self.fail("expected TypeError")
def test_difference_update(self):
if self.otherIsIterable:
self.set.difference_update(self.other)
else:
self.assertRaises(TypeError,
self.set.difference_update,
self.other)
def test_difference(self):
self.assertRaises(TypeError, lambda: self.set - self.other)
self.assertRaises(TypeError, lambda: self.other - self.set)
if self.otherIsIterable:
self.set.difference(self.other)
else:
self.assertRaises(TypeError, self.set.difference, self.other)
#------------------------------------------------------------------------------
class TestOnlySetsNumeric(TestOnlySetsInBinaryOps):
def setUp(self):
self.set = Set((1, 2, 3))
self.other = 19
self.otherIsIterable = False
#------------------------------------------------------------------------------
class TestOnlySetsDict(TestOnlySetsInBinaryOps):
def setUp(self):
self.set = Set((1, 2, 3))
self.other = {1:2, 3:4}
self.otherIsIterable = True
#------------------------------------------------------------------------------
class TestOnlySetsOperator(TestOnlySetsInBinaryOps):
def setUp(self):
self.set = Set((1, 2, 3))
self.other = operator.add
self.otherIsIterable = False
#------------------------------------------------------------------------------
class TestOnlySetsTuple(TestOnlySetsInBinaryOps):
def setUp(self):
self.set = Set((1, 2, 3))
self.other = (2, 4, 6)
self.otherIsIterable = True
#------------------------------------------------------------------------------
class TestOnlySetsString(TestOnlySetsInBinaryOps):
def setUp(self):
self.set = Set((1, 2, 3))
self.other = 'abc'
self.otherIsIterable = True
#------------------------------------------------------------------------------
class TestOnlySetsGenerator(TestOnlySetsInBinaryOps):
def setUp(self):
def gen():
for i in xrange(0, 10, 2):
yield i
self.set = Set((1, 2, 3))
self.other = gen()
self.otherIsIterable = True
#------------------------------------------------------------------------------
class TestOnlySetsofSets(TestOnlySetsInBinaryOps):
def setUp(self):
self.set = Set((1, 2, 3))
self.other = [Set('ab'), ImmutableSet('cd')]
self.otherIsIterable = True
#==============================================================================
class TestCopying(unittest.TestCase):
def test_copy(self):
dup = self.set.copy()
dup_list = list(dup); dup_list.sort()
set_list = list(self.set); set_list.sort()
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self.assertEqual(len(dup_list), len(set_list))
for i in range(len(dup_list)):
self.assertTrue(dup_list[i] is set_list[i])
def test_deep_copy(self):
dup = copy.deepcopy(self.set)
##print type(dup), repr(dup)
dup_list = list(dup); dup_list.sort()
set_list = list(self.set); set_list.sort()
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self.assertEqual(len(dup_list), len(set_list))
for i in range(len(dup_list)):
self.assertEqual(dup_list[i], set_list[i])
#------------------------------------------------------------------------------
class TestCopyingEmpty(TestCopying):
def setUp(self):
self.set = Set()
#------------------------------------------------------------------------------
class TestCopyingSingleton(TestCopying):
def setUp(self):
self.set = Set(["hello"])
#------------------------------------------------------------------------------
class TestCopyingTriple(TestCopying):
def setUp(self):
self.set = Set(["zero", 0, None])
#------------------------------------------------------------------------------
class TestCopyingTuple(TestCopying):
def setUp(self):
self.set = Set([(1, 2)])
#------------------------------------------------------------------------------
class TestCopyingNested(TestCopying):
def setUp(self):
self.set = Set([((1, 2), (3, 4))])
#==============================================================================
class TestIdentities(unittest.TestCase):
def setUp(self):
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self.a = Set([random.randrange(100) for i in xrange(50)])
self.b = Set([random.randrange(100) for i in xrange(50)])
def test_binopsVsSubsets(self):
a, b = self.a, self.b
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self.assertTrue(a - b <= a)
self.assertTrue(b - a <= b)
self.assertTrue(a & b <= a)
self.assertTrue(a & b <= b)
self.assertTrue(a | b >= a)
self.assertTrue(a | b >= b)
self.assertTrue(a ^ b <= a | b)
def test_commutativity(self):
a, b = self.a, self.b
self.assertEqual(a&b, b&a)
self.assertEqual(a|b, b|a)
self.assertEqual(a^b, b^a)
if a != b:
self.assertNotEqual(a-b, b-a)
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def test_reflexsive_relations(self):
a, zero = self.a, Set()
self.assertEqual(a ^ a, zero)
self.assertEqual(a - a, zero)
self.assertEqual(a | a, a)
self.assertEqual(a & a, a)
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self.assertTrue(a <= a)
self.assertTrue(a >= a)
self.assertTrue(a == a)
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def test_summations(self):
# check that sums of parts equal the whole
a, b = self.a, self.b
self.assertEqual((a-b)|(a&b)|(b-a), a|b)
self.assertEqual((a&b)|(a^b), a|b)
self.assertEqual(a|(b-a), a|b)
self.assertEqual((a-b)|b, a|b)
self.assertEqual((a-b)|(a&b), a)
self.assertEqual((b-a)|(a&b), b)
self.assertEqual((a-b)|(b-a), a^b)
def test_exclusion(self):
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# check that inverse operations do not overlap
a, b, zero = self.a, self.b, Set()
self.assertEqual((a-b)&b, zero)
self.assertEqual((b-a)&a, zero)
self.assertEqual((a&b)&(a^b), zero)
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def test_cardinality_relations(self):
a, b = self.a, self.b
self.assertEqual(len(a), len(a-b) + len(a&b))
self.assertEqual(len(b), len(b-a) + len(a&b))
self.assertEqual(len(a^b), len(a-b) + len(b-a))
self.assertEqual(len(a|b), len(a-b) + len(a&b) + len(b-a))
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self.assertEqual(len(a^b) + len(a&b), len(a|b))
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#==============================================================================
libreftest = """
Example from the Library Reference: Doc/lib/libsets.tex
>>> from sets import Set as Base # override _repr to get sorted output
>>> class Set(Base):
... def _repr(self):
... return Base._repr(self, sorted=True)
>>> engineers = Set(['John', 'Jane', 'Jack', 'Janice'])
>>> programmers = Set(['Jack', 'Sam', 'Susan', 'Janice'])
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>>> managers = Set(['Jane', 'Jack', 'Susan', 'Zack'])
>>> employees = engineers | programmers | managers # union
>>> engineering_management = engineers & managers # intersection
>>> fulltime_management = managers - engineers - programmers # difference
>>> engineers.add('Marvin')
>>> print engineers
Set(['Jack', 'Jane', 'Janice', 'John', 'Marvin'])
>>> employees.issuperset(engineers) # superset test
False
>>> employees.union_update(engineers) # update from another set
>>> employees.issuperset(engineers)
True
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>>> for group in [engineers, programmers, managers, employees]:
... group.discard('Susan') # unconditionally remove element
... print group
...
Set(['Jack', 'Jane', 'Janice', 'John', 'Marvin'])
Set(['Jack', 'Janice', 'Sam'])
Set(['Jack', 'Jane', 'Zack'])
Set(['Jack', 'Jane', 'Janice', 'John', 'Marvin', 'Sam', 'Zack'])
"""
#==============================================================================
__test__ = {'libreftest' : libreftest}
def test_main(verbose=None):
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import doctest
from test import test_sets
test_support.run_unittest(
TestSetOfSets,
TestExceptionPropagation,
TestBasicOpsEmpty,
TestBasicOpsSingleton,
TestBasicOpsTuple,
TestBasicOpsTriple,
TestBinaryOps,
TestUpdateOps,
TestMutate,
TestSubsetEqualEmpty,
TestSubsetEqualNonEmpty,
TestSubsetEmptyNonEmpty,
TestSubsetPartial,
TestSubsetNonOverlap,
TestOnlySetsNumeric,
TestOnlySetsDict,
TestOnlySetsOperator,
TestOnlySetsTuple,
TestOnlySetsString,
TestOnlySetsGenerator,
TestOnlySetsofSets,
TestCopyingEmpty,
TestCopyingSingleton,
TestCopyingTriple,
TestCopyingTuple,
TestCopyingNested,
TestIdentities,
doctest.DocTestSuite(test_sets),
)
if __name__ == "__main__":
test_main(verbose=True)