Python spa.Vocabulary类代码示例

def test_extend(rng):
    v = Vocabulary(16, rng=rng)
    v.parse('A+B')
    assert v.keys == ['A', 'B']
    assert not v.unitary

    # Test extending the vocabulary
    v.extend(['C', 'D'])
    assert v.keys == ['A', 'B', 'C', 'D']

    # Test extending the vocabulary with various unitary options
    v.extend(['E', 'F'], unitary=['E'])
    assert v.keys == ['A', 'B', 'C', 'D', 'E', 'F']
    assert v.unitary == ['E']

    # Check if 'E' is unitary
    fft_val = np.fft.fft(v['E'].v)
    fft_imag = fft_val.imag
    fft_real = fft_val.real
    fft_norms = np.sqrt(fft_imag ** 2 + fft_real ** 2)
    assert np.allclose(fft_norms, np.ones(16))

    v.extend(['G', 'H'], unitary=True)
    assert v.keys == ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H']
    assert v.unitary == ['E', 'G', 'H']

def test_transform():
    v1 = Vocabulary(32, rng=np.random.RandomState(7))
    v2 = Vocabulary(64, rng=np.random.RandomState(8))
    A = v1.parse('A')
    B = v1.parse('B')
    C = v1.parse('C')
    t = v1.transform_to(v2)

    assert v2.parse('A').compare(np.dot(t, A.v)) > 0.95
    assert v2.parse('C+B').compare(np.dot(t, C.v + B.v)) > 0.95

    t = v1.transform_to(v2, keys=['A', 'B'])

    assert v2.parse('A').compare(np.dot(t, A.v)) > 0.95
    assert v2.parse('B').compare(np.dot(t, C.v + B.v)) > 0.95

def test_prob_cleanup(rng):
    v = Vocabulary(64, rng=rng)
    assert 1.0 > v.prob_cleanup(0.7, 10000) > 0.9999
    assert 0.9999 > v.prob_cleanup(0.6, 10000) > 0.999
    assert 0.99 > v.prob_cleanup(0.5, 1000) > 0.9

    v = Vocabulary(128, rng=rng)
    assert 0.999 > v.prob_cleanup(0.4, 1000) > 0.997
    assert 0.99 > v.prob_cleanup(0.4, 10000) > 0.97
    assert 0.9 > v.prob_cleanup(0.4, 100000) > 0.8

def test_am_wta(Simulator, plt, seed, rng):
    """Test the winner-take-all ability of the associative memory."""

    D = 64
    vocab = Vocabulary(D, rng=rng)
    vocab.parse('A+B+C+D')

    def input_func(t):
        if t < 0.2:
            return vocab.parse('A+0.8*B').v
        elif t < 0.3:
            return np.zeros(D)
        else:
            return vocab.parse('0.8*A+B').v

    with nengo.Network('model', seed=seed) as m:
        am = AssociativeMemory(vocab, wta_output=True)
        in_node = nengo.Node(output=input_func, label='input')
        nengo.Connection(in_node, am.input)

        in_p = nengo.Probe(in_node)
        out_p = nengo.Probe(am.output, synapse=0.03)

    sim = Simulator(m)
    sim.run(0.5)
    t = sim.trange()
    more_a = (t > 0.15) & (t < 0.2)
    more_b = t > 0.45

    plt.subplot(2, 1, 1)
    plt.plot(t, nengo.spa.similarity(sim.data[in_p], vocab))
    plt.ylabel("Input")
    plt.ylim(top=1.1)
    plt.legend(vocab.keys, loc='best')
    plt.subplot(2, 1, 2)
    plt.plot(t, nengo.spa.similarity(sim.data[out_p], vocab))
    plt.plot(t[more_a], np.ones(t.shape)[more_a] * 0.8, c='g', lw=2)
    plt.plot(t[more_b], np.ones(t.shape)[more_b] * 0.8, c='g', lw=2)
    plt.ylabel("Output")
    plt.legend(vocab.keys, loc='best')

    assert similarity(sim.data[out_p][more_a], vocab.parse("A").v) > 0.8
    assert similarity(sim.data[out_p][more_a], vocab.parse("B").v) < 0.2
    assert similarity(sim.data[out_p][more_b], vocab.parse("B").v) > 0.8
    assert similarity(sim.data[out_p][more_b], vocab.parse("A").v) < 0.2

def test_am_assoc_mem_threshold(Simulator):
    """Standard associative memory (differing input and output vocabularies).

    Options: threshold = 0.5, non-inhibitable, non-wta, does not output
    utilities or thresholded utilities.
    """
    rng = np.random.RandomState(1)

    D = 64
    vocab = Vocabulary(D, rng=rng)
    vocab.parse('A+B+C+D')

    D2 = int(D / 2)
    vocab2 = Vocabulary(D2, rng=rng)
    vocab2.parse('A+B+C+D')

    def input_func(t):
        if t < 0.5:
            return vocab.parse('0.49*A').v
        else:
            return vocab.parse('0.79*A').v

    m = nengo.Network('model', seed=123)
    with m:
        am = AssociativeMemory(vocab, vocab2, threshold=0.5)
        in_node = nengo.Node(output=input_func, label='input')
        out_node = nengo.Node(size_in=D2, label='output')
        nengo.Connection(in_node, am.input)
        nengo.Connection(am.output, out_node, synapse=0.03)

        in_p = nengo.Probe(in_node)
        out_p = nengo.Probe(out_node)

    sim = Simulator(m)
    sim.run(1.0)

    assert np.allclose(sim.data[in_p][490:500], vocab.parse("0.49*A").v,
                       atol=.15, rtol=.01)
    assert np.allclose(sim.data[in_p][-10:], vocab.parse("0.79*A").v,
                       atol=.15, rtol=.01)
    assert np.allclose(sim.data[out_p][490:500], vocab2.parse("0").v,
                       atol=.15, rtol=.01)
    assert np.allclose(sim.data[out_p][-10:], vocab2.parse("A").v,
                       atol=.15, rtol=.01)

def test_transform(rng):
    v1 = Vocabulary(32, rng=rng)
    v2 = Vocabulary(64, rng=rng)
    A = v1.parse("A")
    B = v1.parse("B")
    C = v1.parse("C")
    t = v1.transform_to(v2)

    assert v2.parse("A").compare(np.dot(t, A.v)) > 0.95
    assert v2.parse("C+B").compare(np.dot(t, C.v + B.v)) > 0.9

    t = v1.transform_to(v2, keys=["A", "B"])

    assert v2.parse("A").compare(np.dot(t, A.v)) > 0.95
    assert v2.parse("B").compare(np.dot(t, B.v)) > 0.95

def test_include_pairs():
    v = Vocabulary(10)
    v["A"]
    v["B"]
    v["C"]
    assert v.key_pairs is None
    v.include_pairs = True
    assert v.key_pairs == ["A*B", "A*C", "B*C"]
    v.include_pairs = False
    assert v.key_pairs is None
    v.include_pairs = True
    v["D"]
    assert v.key_pairs == ["A*B", "A*C", "B*C", "A*D", "B*D", "C*D"]

    v = Vocabulary(12, include_pairs=True)
    v["A"]
    v["B"]
    v["C"]
    assert v.key_pairs == ["A*B", "A*C", "B*C"]

def test_include_pairs(rng):
    v = Vocabulary(10, rng=rng)
    v['A']
    v['B']
    v['C']
    assert v.key_pairs is None
    v.include_pairs = True
    assert v.key_pairs == ['A*B', 'A*C', 'B*C']
    v.include_pairs = False
    assert v.key_pairs is None
    v.include_pairs = True
    v['D']
    assert v.key_pairs == ['A*B', 'A*C', 'B*C', 'A*D', 'B*D', 'C*D']

    v = Vocabulary(12, include_pairs=True)
    v['A']
    v['B']
    v['C']
    assert v.key_pairs == ['A*B', 'A*C', 'B*C']

    def initialize_vis_vocab(self, vis_dim, vis_sps):
        if vis_sps.shape[0] != len(self.vis_sp_strs):
            raise RuntimeError('Vocabulatory.initialize_vis_vocab: ' +
                               'Mismatch in shape of raw vision SPs and ' +
                               'number of vision SP labels.')

        self.vis_dim = vis_dim

        self.vis = Vocabulary(self.vis_dim)
        for i, sp_str in enumerate(self.vis_sp_strs):
            self.vis.add(sp_str, vis_sps[i, :])

def test_create_pointer_warning(rng):
    v = Vocabulary(2, rng=rng)

    # five pointers shouldn't fit
    with warns(UserWarning):
        v.parse('A')
        v.parse('B')
        v.parse('C')
        v.parse('D')
        v.parse('E')

def test_am_spa_interaction(Simulator, seed, rng):
    """Make sure associative memory interacts with other SPA modules."""
    D = 16
    vocab = Vocabulary(D, rng=rng)
    vocab.parse('A+B+C+D')

    D2 = int(D / 2)
    vocab2 = Vocabulary(D2, rng=rng)
    vocab2.parse('A+B+C+D')

    def input_func(t):
        return '0.49*A' if t < 0.5 else '0.79*A'

    with nengo.spa.SPA(seed=seed) as m:
        m.buf = nengo.spa.Buffer(D)
        m.input = nengo.spa.Input(buf=input_func)

        m.am = AssociativeMemory(vocab, vocab2,
                                 input_keys=['A', 'B', 'C'],
                                 output_keys=['B', 'C', 'D'],
                                 default_output_key='A',
                                 threshold=0.5,
                                 inhibitable=True,
                                 wta_output=True,
                                 threshold_output=True)

        cortical_actions = nengo.spa.Actions('am = buf')
        m.c_act = nengo.spa.Cortical(cortical_actions)

    # Check to see if model builds properly. No functionality test needed
    Simulator(m)

def test_subset(rng):
    v1 = Vocabulary(32, rng=rng)
    v1.parse('A+B+C+D+E+F+G')

    # Test creating a vocabulary subset
    v2 = v1.create_subset(['A', 'C', 'E'])
    assert v2.keys == ['A', 'C', 'E']
    assert v2['A'] == v1['A']
    assert v2['C'] == v1['C']
    assert v2['E'] == v1['E']
    assert v2.parent is v1

    # Test creating a subset from a subset (it should create off the parent)
    v3 = v2.create_subset(['C', 'E'])
    assert v3.parent is v2.parent and v2.parent is v1

    v3.include_pairs = True
    assert v3.key_pairs == ['C*E']
    assert not v1.include_pairs
    assert not v2.include_pairs

    # Test transform_to between subsets (should be identity transform)
    t = v1.transform_to(v2)

    assert v2.parse('A').compare(np.dot(t, v1.parse('A').v)) >= 0.99999999

def test_am_spa_interaction(Simulator):
    """Standard associative memory interacting with other SPA modules.

    Options: threshold = 0.5, non-inhibitable, non-wta, does not output
    utilities or thresholded utilities.
    """
    rng = np.random.RandomState(1)

    D = 16
    vocab = Vocabulary(D, rng=rng)
    vocab.parse('A+B+C+D')

    D2 = int(D / 2)
    vocab2 = Vocabulary(D2, rng=rng)
    vocab2.parse('A+B+C+D')

    def input_func(t):
        if t < 0.5:
            return '0.49*A'
        else:
            return '0.79*A'

    m = nengo.spa.SPA('model', seed=123)
    with m:
        m.buf = nengo.spa.Buffer(D)
        m.input = nengo.spa.Input(buf=input_func)

        m.am = AssociativeMemory(vocab, vocab2, threshold=0.5)

        cortical_actions = nengo.spa.Actions('am = buf')
        m.c_act = nengo.spa.Cortical(cortical_actions)

    # Check to see if model builds properly. No functionality test needed
    Simulator(m)

def test_am_defaults(Simulator):
    """Default assoc memory.

    Options: auto-associative, threshold = 0.3, non-inhibitable, non-wta,
    does not output utilities or thresholded utilities.
    """

    rng = np.random.RandomState(1)

    D = 64
    vocab = Vocabulary(D, rng=rng)
    vocab.parse('A+B+C+D')

    m = nengo.Network('model', seed=123)
    with m:
        am = AssociativeMemory(vocab)
        in_node = nengo.Node(output=vocab.parse("A").v,
                             label='input')
        out_node = nengo.Node(size_in=D, label='output')
        nengo.Connection(in_node, am.input)
        nengo.Connection(am.output, out_node, synapse=0.03)

        in_p = nengo.Probe(in_node)
        out_p = nengo.Probe(out_node)

    sim = Simulator(m)
    sim.run(1.0)

    assert np.allclose(sim.data[in_p][-10:], vocab.parse("A").v,
                       atol=.1, rtol=.01)
    assert np.allclose(sim.data[out_p][-10:], vocab.parse("A").v,
                       atol=.1, rtol=.01)

def test_am_basic(Simulator, plt, seed, rng):
    """Basic associative memory test."""

    D = 64
    vocab = Vocabulary(D, rng=rng)
    vocab.parse('A+B+C+D')

    with nengo.Network('model', seed=seed) as m:
        am = AssociativeMemory(vocab)
        in_node = nengo.Node(output=vocab.parse("A").v, label='input')
        nengo.Connection(in_node, am.input)

        in_p = nengo.Probe(in_node)
        out_p = nengo.Probe(am.output, synapse=0.03)

    sim = Simulator(m)
    sim.run(0.2)
    t = sim.trange()

    plt.subplot(2, 1, 1)
    plt.plot(t, nengo.spa.similarity(sim.data[in_p], vocab))
    plt.ylabel("Input")
    plt.ylim(top=1.1)
    plt.legend(vocab.keys, loc='best')
    plt.subplot(2, 1, 2)
    plt.plot(t, nengo.spa.similarity(sim.data[out_p], vocab))
    plt.plot(t[t > 0.15], np.ones(t.shape)[t > 0.15] * 0.8, c='g', lw=2)
    plt.ylabel("Output")
    plt.legend(vocab.keys, loc='best')

    assert similarity(sim.data[in_p][t > 0.15], vocab.parse("A").v) > 0.99
    assert similarity(sim.data[out_p][t > 0.15], vocab.parse("A").v) > 0.8