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import pytest
import srsly
from thinc.api import (
Linear,
Maxout,
Model,
Shim,
chain,
deserialize_attr,
serialize_attr,
with_array,
)
@pytest.fixture
def linear():
return Linear(5, 3)
class SerializableAttr:
value = "foo"
def to_bytes(self):
return self.value.encode("utf8")
def from_bytes(self, data):
self.value = f"{data.decode('utf8')} from bytes"
return self
class SerializableShim(Shim):
name = "testshim"
value = "shimdata"
def to_bytes(self):
return self.value.encode("utf8")
def from_bytes(self, data):
self.value = f"{data.decode('utf8')} from bytes"
return self
def test_pickle_with_flatten(linear):
Xs = [linear.ops.alloc2f(2, 3), linear.ops.alloc2f(4, 3)]
model = with_array(linear).initialize()
pickled = srsly.pickle_dumps(model)
loaded = srsly.pickle_loads(pickled)
Ys = loaded.predict(Xs)
assert len(Ys) == 2
assert Ys[0].shape == (Xs[0].shape[0], linear.get_dim("nO"))
assert Ys[1].shape == (Xs[1].shape[0], linear.get_dim("nO"))
def test_simple_model_roundtrip_bytes():
model = Maxout(5, 10, nP=2).initialize()
b = model.get_param("b")
b += 1
data = model.to_bytes()
b = model.get_param("b")
b -= 1
model = model.from_bytes(data)
assert model.get_param("b")[0, 0] == 1
def test_simple_model_roundtrip_bytes_length():
"""Ensure that serialization of non-initialized weight matrices goes fine"""
model1 = Maxout(5, 10, nP=2)
model2 = Maxout(5, 10, nP=2)
data1 = model1.to_bytes()
model2 = model2.from_bytes(data1)
data2 = model2.to_bytes()
assert data1 == data2
assert len(data1) == len(data2)
def test_simple_model_roundtrip_bytes_serializable_attrs():
fwd = lambda model, X, is_train: (X, lambda dY: dY)
attr = SerializableAttr()
assert attr.value == "foo"
assert attr.to_bytes() == b"foo"
model = Model("test", fwd, attrs={"test": attr})
model.initialize()
@serialize_attr.register(SerializableAttr)
def serialize_attr_custom(_, value, name, model):
return value.to_bytes()
@deserialize_attr.register(SerializableAttr)
def deserialize_attr_custom(_, value, name, model):
return SerializableAttr().from_bytes(value)
model_bytes = model.to_bytes()
model = model.from_bytes(model_bytes)
assert "test" in model.attrs
assert model.attrs["test"].value == "foo from bytes"
def test_multi_model_roundtrip_bytes():
model = chain(Maxout(5, 10, nP=2), Maxout(2, 3)).initialize()
b = model.layers[0].get_param("b")
b += 1
b = model.layers[1].get_param("b")
b += 2
data = model.to_bytes()
b = model.layers[0].get_param("b")
b -= 1
b = model.layers[1].get_param("b")
b -= 2
model = model.from_bytes(data)
assert model.layers[0].get_param("b")[0, 0] == 1
assert model.layers[1].get_param("b")[0, 0] == 2
def test_multi_model_load_missing_dims():
model = chain(Maxout(5, 10, nP=2), Maxout(2, 3)).initialize()
b = model.layers[0].get_param("b")
b += 1
b = model.layers[1].get_param("b")
b += 2
data = model.to_bytes()
model2 = chain(Maxout(5, nP=None), Maxout(nP=None))
model2 = model2.from_bytes(data)
assert model2.layers[0].get_param("b")[0, 0] == 1
assert model2.layers[1].get_param("b")[0, 0] == 2
def test_serialize_model_shims_roundtrip_bytes():
fwd = lambda model, X, is_train: (X, lambda dY: dY)
test_shim = SerializableShim(None)
shim_model = Model("shimmodel", fwd, shims=[test_shim])
model = chain(Linear(2, 3), shim_model, Maxout(2, 3))
model.initialize()
assert model.layers[1].shims[0].value == "shimdata"
model_bytes = model.to_bytes()
with pytest.raises(ValueError):
Linear(2, 3).from_bytes(model_bytes)
test_shim = SerializableShim(None)
shim_model = Model("shimmodel", fwd, shims=[test_shim])
new_model = chain(Linear(2, 3), shim_model, Maxout(2, 3)).from_bytes(model_bytes)
assert new_model.layers[1].shims[0].value == "shimdata from bytes"
def test_serialize_refs_roundtrip_bytes():
fwd = lambda model, X, is_train: (X, lambda dY: dY)
model_a = Model("a", fwd)
model = Model("test", fwd, refs={"a": model_a, "b": None}).initialize()
with pytest.raises(ValueError): # ref not in nodes
model.to_bytes()
model = Model("test", fwd, refs={"a": model_a, "b": None}, layers=[model_a])
assert model.ref_names == ("a", "b")
model_bytes = model.to_bytes()
with pytest.raises(ValueError):
Model("test", fwd).from_bytes(model_bytes)
new_model = Model("test", fwd, layers=[model_a])
new_model.from_bytes(model_bytes)
assert new_model.ref_names == ("a", "b")
def test_serialize_attrs():
fwd = lambda model, X, is_train: (X, lambda dY: dY)
attrs = {"test": "foo"}
model1 = Model("test", fwd, attrs=attrs).initialize()
bytes_attr = serialize_attr(model1.attrs["test"], attrs["test"], "test", model1)
assert bytes_attr == srsly.msgpack_dumps("foo")
model2 = Model("test", fwd, attrs={"test": ""})
result = deserialize_attr(model2.attrs["test"], bytes_attr, "test", model2)
assert result == "foo"
# Test objects with custom serialization functions
@serialize_attr.register(SerializableAttr)
def serialize_attr_custom(_, value, name, model):
return value.to_bytes()
@deserialize_attr.register(SerializableAttr)
def deserialize_attr_custom(_, value, name, model):
return SerializableAttr().from_bytes(value)
attrs = {"test": SerializableAttr()}
model3 = Model("test", fwd, attrs=attrs)
bytes_attr = serialize_attr(model3.attrs["test"], attrs["test"], "test", model3)
assert bytes_attr == b"foo"
model4 = Model("test", fwd, attrs=attrs)
assert model4.attrs["test"].value == "foo"
result = deserialize_attr(model4.attrs["test"], bytes_attr, "test", model4)
assert result.value == "foo from bytes"
def test_simple_model_can_from_dict():
model = Maxout(5, 10, nP=2).initialize()
model_dict = model.to_dict()
assert model.can_from_dict(model_dict)
# Test check without initialize
assert Maxout(5, 10, nP=2).can_from_dict(model_dict)
# Test not-strict check
assert not Maxout(10, 5, nP=2).can_from_dict(model_dict)
assert Maxout(5, nP=2).can_from_dict(model_dict)
def test_multi_model_can_from_dict():
model = chain(Maxout(5, 10, nP=2), Maxout(2, 3)).initialize()
model_dict = model.to_dict()
assert model.can_from_dict(model_dict)
assert chain(Maxout(5, 10, nP=2), Maxout(2, 3)).can_from_dict(model_dict)
resized = chain(Maxout(5, 10, nP=3), Maxout(2, 3))
assert not resized.can_from_dict(model_dict)
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