def _test_activation_coverage(act_type):
config_coverage = sockeye.coverage.CoverageConfig(
type=act_type,
max_fertility=2,
num_hidden=2,
layer_normalization=False)
encoder_num_hidden, decoder_num_hidden, source_seq_len, batch_size = 5, 5, 10, 4
# source: (batch_size, source_seq_len, encoder_num_hidden)
source = mx.sym.Variable("source")
# source_length: (batch_size,)
source_length = mx.sym.Variable("source_length")
# prev_hidden: (batch_size, decoder_num_hidden)
prev_hidden = mx.sym.Variable("prev_hidden")
# prev_coverage: (batch_size, source_seq_len, coverage_num_hidden)
prev_coverage = mx.sym.Variable("prev_coverage")
# attention_scores: (batch_size, source_seq_len)
attention_scores = mx.sym.Variable("attention_scores")
source_shape = (batch_size, source_seq_len, encoder_num_hidden)
source_length_shape = (batch_size, )
prev_hidden_shape = (batch_size, decoder_num_hidden)
attention_scores_shape = (batch_size, source_seq_len)
prev_coverage_shape = (batch_size, source_seq_len,
config_coverage.num_hidden)
source_data = gaussian_vector(shape=source_shape)
source_length_data = integer_vector(shape=source_length_shape,
max_value=source_seq_len)
prev_hidden_data = gaussian_vector(shape=prev_hidden_shape)
prev_coverage_data = gaussian_vector(shape=prev_coverage_shape)
attention_scores_data = uniform_vector(shape=attention_scores_shape)
attention_scores_data = attention_scores_data / np.sum(
attention_scores_data)
coverage = sockeye.coverage.get_coverage(config_coverage)
coverage_func = coverage.on(source, source_length, source_seq_len)
updated_coverage = coverage_func(prev_hidden, attention_scores,
prev_coverage)
executor = updated_coverage.simple_bind(
ctx=mx.cpu(),
source=source_shape,
source_length=source_length_shape,
prev_hidden=prev_hidden_shape,
prev_coverage=prev_coverage_shape,
attention_scores=attention_scores_shape)
executor.arg_dict["source"][:] = source_data
executor.arg_dict["source_length"][:] = source_length_data
executor.arg_dict["prev_hidden"][:] = prev_hidden_data
executor.arg_dict["prev_coverage"][:] = prev_coverage_data
executor.arg_dict["attention_scores"][:] = attention_scores_data
result = executor.forward()
new_coverage = result[0].asnumpy()
assert new_coverage.shape == prev_coverage_shape
# this is needed to modulate the 0 input. The output changes according to the activation type used.
modulated = mx.nd.Activation(mx.nd.zeros((1, 1)),
act_type=act_type).asnumpy()
assert (np.sum(
np.sum(np.isclose(new_coverage, modulated, atol=1.e-6), axis=2) != 0,
axis=1) == source_length_data).all()
def _test_gru_coverage():
config_coverage = sockeye.coverage.CoverageConfig(
type="gru", num_hidden=2, layer_normalization=False)
encoder_num_hidden, decoder_num_hidden, source_seq_len, batch_size = 5, 5, 10, 4
# source: (batch_size, source_seq_len, encoder_num_hidden)
source = mx.sym.Variable("source")
# source_length: (batch_size,)
source_length = mx.sym.Variable("source_length")
# prev_hidden: (batch_size, decoder_num_hidden)
prev_hidden = mx.sym.Variable("prev_hidden")
# prev_coverage: (batch_size, source_seq_len, coverage_num_hidden)
prev_coverage = mx.sym.Variable("prev_coverage")
# attention_scores: (batch_size, source_seq_len)
attention_scores = mx.sym.Variable("attention_scores")
source_shape = (batch_size, source_seq_len, encoder_num_hidden)
source_length_shape = (batch_size, )
prev_hidden_shape = (batch_size, decoder_num_hidden)
attention_scores_shape = (batch_size, source_seq_len)
prev_coverage_shape = (batch_size, source_seq_len,
config_coverage.num_hidden)
source_data = gaussian_vector(shape=source_shape)
source_length_data = integer_vector(shape=source_length_shape,
max_value=source_seq_len)
prev_hidden_data = gaussian_vector(shape=prev_hidden_shape)
prev_coverage_data = gaussian_vector(shape=prev_coverage_shape)
attention_scores_data = uniform_vector(shape=attention_scores_shape)
attention_scores_data = attention_scores_data / np.sum(
attention_scores_data)
coverage = sockeye.coverage.get_coverage(config_coverage)
coverage_func = coverage.on(source, source_length, source_seq_len)
updated_coverage = coverage_func(prev_hidden, attention_scores,
prev_coverage)
executor = updated_coverage.simple_bind(
ctx=mx.cpu(),
source=source_shape,
source_length=source_length_shape,
prev_hidden=prev_hidden_shape,
prev_coverage=prev_coverage_shape,
attention_scores=attention_scores_shape)
executor.arg_dict["source"][:] = source_data
executor.arg_dict["source_length"][:] = source_length_data
executor.arg_dict["prev_hidden"][:] = prev_hidden_data
executor.arg_dict["prev_coverage"][:] = prev_coverage_data
executor.arg_dict["attention_scores"][:] = attention_scores_data
result = executor.forward()
new_coverage = result[0].asnumpy()
assert new_coverage.shape == prev_coverage_shape
assert (np.sum(np.sum(new_coverage != 1, axis=2) != 0,
axis=1) == source_length_data).all()
def _test_activation_coverage(act_type):
config_coverage = sockeye.coverage.CoverageConfig(type=act_type, num_hidden=2, layer_normalization=False)
encoder_num_hidden, decoder_num_hidden, source_seq_len, batch_size = 5, 5, 10, 4
# source: (batch_size, source_seq_len, encoder_num_hidden)
source = mx.sym.Variable("source")
# source_length: (batch_size,)
source_length = mx.sym.Variable("source_length")
# prev_hidden: (batch_size, decoder_num_hidden)
prev_hidden = mx.sym.Variable("prev_hidden")
# prev_coverage: (batch_size, source_seq_len, coverage_num_hidden)
prev_coverage = mx.sym.Variable("prev_coverage")
# attention_scores: (batch_size, source_seq_len)
attention_scores = mx.sym.Variable("attention_scores")
source_shape = (batch_size, source_seq_len, encoder_num_hidden)
source_length_shape = (batch_size,)
prev_hidden_shape = (batch_size, decoder_num_hidden)
attention_scores_shape = (batch_size, source_seq_len)
prev_coverage_shape = (batch_size, source_seq_len, config_coverage.num_hidden)
source_data = gaussian_vector(shape=source_shape)
source_length_data = integer_vector(shape=source_length_shape, max_value=source_seq_len)
prev_hidden_data = gaussian_vector(shape=prev_hidden_shape)
prev_coverage_data = gaussian_vector(shape=prev_coverage_shape)
attention_scores_data = uniform_vector(shape=attention_scores_shape)
attention_scores_data = attention_scores_data / np.sum(attention_scores_data)
coverage = sockeye.coverage.get_coverage(config_coverage)
coverage_func = coverage.on(source, source_length, source_seq_len)
updated_coverage = coverage_func(prev_hidden, attention_scores, prev_coverage)
executor = updated_coverage.simple_bind(ctx=mx.cpu(),
source=source_shape,
source_length=source_length_shape,
prev_hidden=prev_hidden_shape,
prev_coverage=prev_coverage_shape,
attention_scores=attention_scores_shape)
executor.arg_dict["source"][:] = source_data
executor.arg_dict["source_length"][:] = source_length_data
executor.arg_dict["prev_hidden"][:] = prev_hidden_data
executor.arg_dict["prev_coverage"][:] = prev_coverage_data
executor.arg_dict["attention_scores"][:] = attention_scores_data
result = executor.forward()
new_coverage = result[0].asnumpy()
assert new_coverage.shape == prev_coverage_shape
# this is needed to modulate the 0 input. The output changes according to the activation type used.
modulated = mx.nd.Activation(mx.nd.zeros((1, 1)), act_type=act_type).asnumpy()
assert (np.sum(np.sum(np.isclose(new_coverage, modulated, atol=1.e-6), axis=2) != 0, axis=1) == source_length_data).all()
def _test_gru_coverage():
config_coverage = sockeye.coverage.CoverageConfig(type="gru", num_hidden=2, layer_normalization=False)
encoder_num_hidden, decoder_num_hidden, source_seq_len, batch_size = 5, 5, 10, 4
# source: (batch_size, source_seq_len, encoder_num_hidden)
source = mx.sym.Variable("source")
# source_length: (batch_size,)
source_length = mx.sym.Variable("source_length")
# prev_hidden: (batch_size, decoder_num_hidden)
prev_hidden = mx.sym.Variable("prev_hidden")
# prev_coverage: (batch_size, source_seq_len, coverage_num_hidden)
prev_coverage = mx.sym.Variable("prev_coverage")
# attention_scores: (batch_size, source_seq_len)
attention_scores = mx.sym.Variable("attention_scores")
source_shape = (batch_size, source_seq_len, encoder_num_hidden)
source_length_shape = (batch_size,)
prev_hidden_shape = (batch_size, decoder_num_hidden)
attention_scores_shape = (batch_size, source_seq_len)
prev_coverage_shape = (batch_size, source_seq_len, config_coverage.num_hidden)
source_data = gaussian_vector(shape=source_shape)
source_length_data = integer_vector(shape=source_length_shape, max_value=source_seq_len)
prev_hidden_data = gaussian_vector(shape=prev_hidden_shape)
prev_coverage_data = gaussian_vector(shape=prev_coverage_shape)
attention_scores_data = uniform_vector(shape=attention_scores_shape)
attention_scores_data = attention_scores_data / np.sum(attention_scores_data)
coverage = sockeye.coverage.get_coverage(config_coverage)
coverage_func = coverage.on(source, source_length, source_seq_len)
updated_coverage = coverage_func(prev_hidden, attention_scores, prev_coverage)
executor = updated_coverage.simple_bind(ctx=mx.cpu(),
source=source_shape,
source_length=source_length_shape,
prev_hidden=prev_hidden_shape,
prev_coverage=prev_coverage_shape,
attention_scores=attention_scores_shape)
executor.arg_dict["source"][:] = source_data
executor.arg_dict["source_length"][:] = source_length_data
executor.arg_dict["prev_hidden"][:] = prev_hidden_data
executor.arg_dict["prev_coverage"][:] = prev_coverage_data
executor.arg_dict["attention_scores"][:] = attention_scores_data
result = executor.forward()
new_coverage = result[0].asnumpy()
assert new_coverage.shape == prev_coverage_shape
assert (np.sum(np.sum(new_coverage != 1, axis=2) != 0, axis=1) == source_length_data).all()