Python diffの例

コード例 #1

ファイル: test_itertoolz.py プロジェクト: zhouyujoe/toolz

def test_diff():
    assert raises(TypeError, lambda: list(diff()))
    assert raises(TypeError, lambda: list(diff([1, 2])))
    assert raises(TypeError, lambda: list(diff([1, 2], 3)))
    assert list(diff([1, 2], (1, 2), iter([1, 2]))) == []
    assert list(diff([1, 2, 3], (1, 10, 3), iter([1, 2, 10]))) == [(2, 10, 2),
                                                                   (3, 3, 10)]
    assert list(diff([1, 2], [10])) == [(1, 10)]
    assert list(diff([1, 2], [10], default=None)) == [(1, 10), (2, None)]
    # non-variadic usage
    assert raises(TypeError, lambda: list(diff([])))
    assert raises(TypeError, lambda: list(diff([[]])))
    assert raises(TypeError, lambda: list(diff([[1, 2]])))
    assert raises(TypeError, lambda: list(diff([[1, 2], 3])))
    assert list(diff([(1, 2), (1, 3)])) == [(2, 3)]

    data1 = [{
        'cost': 1,
        'currency': 'dollar'
    }, {
        'cost': 2,
        'currency': 'dollar'
    }]

    data2 = [{
        'cost': 100,
        'currency': 'yen'
    }, {
        'cost': 300,
        'currency': 'yen'
    }]

    conversions = {'dollar': 1, 'yen': 0.01}

    def indollars(item):
        return conversions[item['currency']] * item['cost']

    list(diff(data1, data2, key=indollars)) == [({
        'cost': 2,
        'currency': 'dollar'
    }, {
        'cost': 300,
        'currency': 'yen'
    })]

コード例 #2

ファイル: test_itertoolz.py プロジェクト: caioaao/toolz

def test_diff():
    assert raises(TypeError, lambda: list(diff()))
    assert raises(TypeError, lambda: list(diff([1, 2])))
    assert raises(TypeError, lambda: list(diff([1, 2], 3)))
    assert list(diff([1, 2], (1, 2), iter([1, 2]))) == []
    assert list(diff([1, 2, 3], (1, 10, 3), iter([1, 2, 10]))) == [
        (2, 10, 2), (3, 3, 10)]
    assert list(diff([1, 2], [10])) == [(1, 10)]
    assert list(diff([1, 2], [10], default=None)) == [(1, 10), (2, None)]
    # non-variadic usage
    assert raises(TypeError, lambda: list(diff([])))
    assert raises(TypeError, lambda: list(diff([[]])))
    assert raises(TypeError, lambda: list(diff([[1, 2]])))
    assert raises(TypeError, lambda: list(diff([[1, 2], 3])))
    assert list(diff([(1, 2), (1, 3)])) == [(2, 3)]

    data1 = [{'cost': 1, 'currency': 'dollar'},
             {'cost': 2, 'currency': 'dollar'}]

    data2 = [{'cost': 100, 'currency': 'yen'},
             {'cost': 300, 'currency': 'yen'}]

    conversions = {'dollar': 1, 'yen': 0.01}

    def indollars(item):
        return conversions[item['currency']] * item['cost']

    list(diff(data1, data2, key=indollars)) == [
        ({'cost': 2, 'currency': 'dollar'}, {'cost': 300, 'currency': 'yen'})]