示例#1
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def test_pair_broken():
    assert pair_check('([[}])') == -1
    assert pair_check('(){[]}[)') == -1
示例#2
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def test_pair_balanced():
    assert pair_check('(){}[]') == 0
示例#3
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def test_pair_open():
    # note that '([[}])' will return broken
    assert pair_check('([{}])[') == 1
    assert pair_check('{()([])') == 1
示例#4
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def test_pair_balanced_nested():
    assert pair_check('([{}])') == 0