def test_reuse_dropout():
x1 = tx.Constant(np.ones(shape=[2, 4]), dtype=tf.float32)
x2 = tx.Activation(x1)
drop1 = tx.Dropout(x2, probability=0.5, locked=True)
assert len(drop1.inputs) == 2
assert drop1.inputs[0] is x2
assert drop1.inputs[-1] is drop1.layer_state.mask
# shared state overrides mask?
_, mask = tx.dropout(x2, return_mask=True)
drop2 = drop1.reuse_with(x2, mask)
assert len(drop2.inputs) == 2
assert drop2.inputs[0] is x2
assert drop2.inputs[-1] is drop2.layer_state.mask
assert not tx.tensor_equal(drop1(), drop2())
graph = tx.Graph.build(inputs=None, outputs=[drop1, drop2])
out1, out2 = graph()
assert tx.tensor_equal(out1, out2)
drop1 = tx.Dropout(x2, probability=0.5)
drop2 = drop1.reuse_with(x1)
graph.eval(drop1, drop2)
def test_add_optimizer():
target = tx.Constant([[1.]])
inputs = tx.Input(n_units=2, name="inputs")
output = tx.Linear(inputs, n_units=1, name="y")
loss = tx.Lambda(target,
output,
fn=tf.nn.softmax_cross_entropy_with_logits,
name="xent")
m = tx.Model(run_outputs=output,
train_inputs=[inputs, target],
train_loss=loss)
lr = tx.Param(init_value=0.2, name="lr")
optimizer1 = m.set_optimizer(tf.optimizers.SGD, lr=lr)
optimizer2: tf.optimizers.Optimizer = m.optimizer
assert optimizer1 == optimizer2
# optimizer is hashable
opt_dict = {optimizer1: 0, optimizer2: 1}
assert optimizer1 in opt_dict
assert opt_dict[optimizer1] == 1
lr.value = 0.3
assert np.float32(0.3) == optimizer1.lr.numpy()
def test_linear():
inputs = tx.Constant(tf.ones([2, 4]), dtype=tf.float64)
inputs2 = inputs * 2
linear = tx.Linear(inputs, n_units=8, dtype=tf.float64)
w = linear.weights
b = linear.bias
assert w.shape == [4, 8]
assert b.shape == [8]
assert len(linear.trainable_variables) == 2
t1 = linear()
t2 = linear()
assert tx.tensor_equal(t1, t2)
linear2 = tx.Linear(linear.inputs[0],
8,
share_state_with=linear,
dtype=tf.float64)
t3 = linear2()
assert tx.tensor_equal(t1, t3)
linear = tx.Linear(inputs, 8, dtype=tf.float64)
linear2 = linear.reuse_with(inputs2)
assert linear.weights is linear2.weights
assert linear.bias is linear2.bias
assert tx.tensor_equal(linear() * 2, linear2())
def test_variable_checkpoint(tmp_path):
inputs = tx.Constant(tf.ones([2, 4]))
l1 = tx.Linear(inputs, 3, add_bias=True, name="l1")
l2 = tx.Linear(inputs, 3, add_bias=False, name="l1")
# track: AutoTrackable = l1.layer_state
checkpoint = tf.train.Checkpoint(l1=l1)
manager = tf.train.CheckpointManager(checkpoint,
tmp_path / 'ckpts',
max_to_keep=1)
manager.save(1)
# manager.save(2)
l1.weights.assign(l2.weights.value())
status = checkpoint.restore(manager.latest_checkpoint)
status.assert_existing_objects_matched()
checkpoint_vars = tf.train.list_variables(manager.latest_checkpoint)
assert len(checkpoint_vars) == 4
assert checkpoint_vars[0][0] == '_CHECKPOINTABLE_OBJECT_GRAPH'
assert "l1/bias" in checkpoint_vars[1][0]
assert "l1/weights" in checkpoint_vars[2][0]
assert "save_counter" in checkpoint_vars[3][0]
def test_conv1d():
n_features = 3
embed_size = 128
seq_size = 3
batch_size = 2
inputs = tx.Constant(np.random.random([batch_size, seq_size]),
n_units=seq_size,
dtype=tf.int32)
emb = tx.Lookup(inputs,
seq_size=seq_size,
embedding_shape=[n_features, embed_size])
seq = emb()
n_units = 100
filter_size = 4
cnn = tf.keras.layers.Conv1D(filters=n_units,
kernel_size=filter_size,
padding='same')
res = cnn(seq)
cnn2 = tx.Conv1D(emb, n_units=100, filter_size=filter_size)
res2 = cnn2(seq)
assert len(cnn.variables) == len(cnn.variables)
cnn.kernel = cnn2.filters
cnn.bias = cnn2.bias
res3 = cnn(seq)
assert not tx.tensor_equal(res, res2)
assert tx.tensor_equal(res2, res3)
def test_conv1d():
num_filters = 2
input_dim = 4
seq_size = 3
batch_size = 2
filter_size = 2
filter_shape = [filter_size, input_dim, num_filters]
x = tf.ones([batch_size, seq_size, input_dim])
x_layer = tx.Constant(x, input_dim)
filters = tf.ones(filter_shape)
conv_layer = tx.Conv1D(x_layer, num_filters, filter_size, filters=filters)
conv = tf.nn.conv1d(input=x,
filters=filters,
stride=1,
padding="SAME",
data_format="NWC")
output = conv_layer()
assert tx.tensor_equal(conv, output)
assert tx.tensor_equal(tf.shape(conv_layer.filters),
[filter_size, input_dim, num_filters])
assert tx.tensor_equal(tf.shape(output),
[batch_size, seq_size, num_filters])
def test_mul():
# also tests graphs with constants
inputs = tx.Constant(tf.constant(2), dtype=tf.float64)
inputs2 = inputs * 2
assert tx.tensor_equal(inputs2(), inputs() * 2)
inputs2_fn = tf.function(inputs2.__call__)
assert inputs2_fn() == inputs2()
def test_module_reuse_order():
x1 = tx.Input([[2.]], n_units=1, name="x1")
x2 = tx.Input([[2.]], n_units=1, name="x2")
x3 = tx.Input([[1.]], n_units=1, name="x3")
h = tx.Add(x2, x3)
y = tx.Add(x1, h)
module = tx.Module(inputs=[x1, x2, x3], output=y)
x1_ = tx.Constant([[2.]], name="x1b")
x2_ = tx.Constant([[2.]], name="x2b")
m2 = module.reuse_with(x1_, x2_)
m1 = module()
m2 = m2()
assert tx.tensor_equal(m1, m2)
def test_constant_save(tmp_path):
tmp_path = tmp_path.joinpath("custom")
save_path = str(tmp_path)
l1 = tx.Constant(tf.constant(42.))
assert l1() == 42.
tf.saved_model.save(l1, save_path)
loaded = tf.saved_model.load(save_path)
assert loaded() == 42.
def test_model_vars():
target = tx.Constant([[1.]])
inputs = tx.Input(n_units=2, name="inputs", constant=False)
output = tx.Linear(inputs, n_units=1, name="y")
loss = tx.Lambda(target,
output,
fn=tf.nn.softmax_cross_entropy_with_logits,
name="xent")
m = tx.Model(run_outputs=output,
train_inputs=[inputs, target],
train_loss=loss)
assert m.trainable_variables == output.trainable_variables
def test_graph_input_order():
in1 = tx.Input(n_units=1, name="in1", dtype=tf.float32, constant=False)
in2 = tx.Input(n_units=1, name="in2", dtype=tf.float32, constant=False)
in12 = tx.Add(in1, in2)
in3 = tx.Constant(tf.ones(shape=[1], dtype=tf.float32))
in123 = tx.Add(in12, in3)
graph = tx.Graph.build(inputs=None, outputs=in123)
# print("\n")
# for layer,p in graph.dependency_iter().items():
# print(layer.name)
# print(p)
print(list(map(lambda x: x.name, graph.in_nodes)))
def test_lookup_sequence_sparse():
input_dim = 10
embed_dim = 3
seq_size = 2
batch_size = 3
sparse_input = tf.SparseTensor([[0, 2], [1, 0], [2, 1]], [1, 1, 1],
[3, input_dim])
sparse_input_1d = tf.SparseTensor([[2], [0], [1]], [1, 1, 1], [input_dim])
tensor_input = tx.Constant(sparse_input, input_dim)
tensor_input_1d = tx.Constant(sparse_input_1d, input_dim)
lookup = tx.Lookup(tensor_input,
seq_size,
embedding_shape=[input_dim, embed_dim],
batch_size=batch_size,
batch_padding=False)
lookup_padding = tx.Lookup(tensor_input,
seq_size,
embedding_shape=[input_dim, embed_dim],
batch_size=batch_size,
batch_padding=True)
lookup_1d = tx.Lookup(tensor_input_1d,
seq_size,
embedding_shape=[input_dim, embed_dim],
batch_size=batch_size,
batch_padding=True)
result = lookup()
result_padding = lookup_padding()
result_1d = lookup_1d()
assert np.shape(result) == (2, seq_size, embed_dim)
assert np.shape(result_padding) == (batch_size, seq_size, embed_dim)
assert np.shape(result_1d) == (batch_size, seq_size, embed_dim)
def test_multihead_attention():
"""
TODO check causality
"""
n_features = 3
embed_size = 128
seq_size = 3
batch_size = 2
n_heads = 8
inputs = tx.Constant(np.random.random([batch_size, seq_size]),
n_units=seq_size,
dtype=tf.int32)
emb = tx.Lookup(inputs,
seq_size=seq_size,
embedding_shape=[n_features, embed_size])
attention = tx.MHAttention(query=emb,
key=emb,
value=emb,
n_units=embed_size,
n_heads=n_heads,
causality=False,
attention_dropout=0.1,
regularized=False)
assert len(attention.inputs) == 3
# 3 "kernels" + bias
assert len(attention.variables) == 3
attention_reg = attention.reuse_with(emb, emb, emb, regularized=True)
attention_2 = attention.reuse_with(emb, emb, emb, regularized=False)
attention_causal = attention.reuse_with(emb, emb, emb, causality=True)
attention_causal()
result = attention()
result_reg = attention_reg()
result2 = attention_2()
assert tx.same_shape(result, result_reg)
assert tx.tensor_equal(result, result2)
vars1 = map(lambda v: v.ref(), attention.variables)
vars2 = map(lambda v: v.ref(), attention_2.variables)
assert set(vars1) == set(vars2)
def test_attention():
n_features = 3
embed_size = 8
seq_size = 3
batch_size = 2
inputs = tx.Constant(np.random.random([batch_size, seq_size]),
n_units=seq_size,
dtype=tf.int32)
emb = tx.Lookup(inputs,
seq_size=seq_size,
embedding_shape=[n_features, embed_size])
seq = emb()
# keras attention doesn't have multiple heads
attention = Attention(use_scale=False)
res = attention([seq, seq, seq])
attention2 = tx.MHAttention(emb, emb, emb, n_units=embed_size, n_heads=1)
assert len(attention2.variables) == 3
attention2.wq = tx.Linear(emb,
n_units=None,
weights=tf.linalg.eye(embed_size, embed_size),
add_bias=False)
attention2.wk = tx.Linear(emb,
n_units=None,
weights=tf.linalg.eye(embed_size, embed_size),
add_bias=False)
attention2.wv = tx.Linear(emb,
n_units=None,
weights=tf.linalg.eye(embed_size, embed_size),
add_bias=False)
assert tx.tensor_equal(attention2.wq(seq), seq)
res2 = attention2()
g = tx.Graph.build(inputs=emb, outputs=attention2)
g = g.as_function(ord_inputs=emb, ord_outputs=attention2)
res3 = g(seq)
assert tx.tensor_equal(res, res2)
assert tx.tensor_equal(res, res3)
def test_to_sparse_gradient():
target = tf.constant([[1., 0.], [1., 0.]])
x = tx.Constant(tf.ones([1, 4], dtype=tf.float32), n_units=4)
h = tx.Linear(x, n_units=2)
y = tx.ToSparse(h)
y = tx.ToDense(y)
@tf.function
def loss_fn(labels, prediction):
return tf.reduce_mean(tf.pow(labels - prediction, 2))
with tf.GradientTape() as tape:
pred = y()
loss = loss_fn(target, pred)
gradients = tape.gradient(loss, h.trainable_variables)
assert len(gradients) == 2
assert tx.same_shape(gradients[0], h.weights)
assert tx.same_shape(gradients[1], h.bias)
def test_graph_as_function():
data = [[1., 2.]]
in1 = tx.Input(n_units=1, name="in1", dtype=tf.float32, constant=False)
in2 = tx.Input(n_units=1, name="in1", dtype=tf.float32, constant=False)
in3 = tx.Constant(tf.ones(shape=[1], dtype=tf.float32))
in12 = tx.Add(in1, in2, in3)
graph = tx.Graph.build(inputs=[in1, in2, in3], outputs=in12)
fn = graph.as_function_v2(ord_inputs=[in1, in2, in3],
stateful_inputs=True,
compile=False,
fn_name="add")
# fn = graph.as_function_v2(stateful_inputs=True, compile=False)
# TODO I should make sure the function converts the inputs to tensors
# to make sure I don't pass lists around
assert fn(np.array([[1.]], dtype=np.float),
np.array([[1.]], dtype=np.float)) == [[3]]
assert fn() == [[3]]
assert fn([[1.]], [[2.]]) == [[4]]
assert fn() == [[4]]
assert fn([[2.]]) == [[5]]
def test_lookup_sparse_padding():
""" Sparse Lookup Padding
Lookup adds padding if seq_size is greater than the max row indice
in the input SparseTensor
"""
input_dim = 6
embed_dim = 4
seq_size = 3
sparse_input = tf.SparseTensor(indices=[[0, 1], [0, 3], [1, 0]],
values=[1, 1, 1],
dense_shape=[2, input_dim])
sparse_input = tx.Constant(sparse_input, input_dim)
lookup = tx.Lookup(sparse_input,
seq_size=seq_size,
embedding_shape=[input_dim, embed_dim],
batch_size=None,
batch_padding=False)
result = lookup()
assert tf.sparse.to_dense(sparse_input()).shape == (2, input_dim)
assert tx.tensor_equal(result[0][-1], tf.zeros([embed_dim]))
def test_constant_shape():
tensor = tf.ones([3, 3])
const_layer = tx.Constant(tensor)
assert const_layer.shape == tensor.shape
def test_linear_function():
inputs = tx.Constant(tf.ones([2, 4]), dtype=tf.float64)
linear = tx.Linear(inputs, n_units=8, dtype=tf.float64)
fn = tf.function(linear.__call__)
assert tx.tensor_equal(fn(), linear())
