Source code for bigdl.dllib.keras.models
#
# Copyright 2016 The BigDL Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import sys
from bigdl.dllib.utils.utils import remove_batch
from .engine.topology import KerasNet
from bigdl.dllib.utils.common import to_list
from bigdl.dllib.utils.log4Error import *
from bigdl.dllib.utils.file_utils import callZooFunc
from bigdl.dllib.utils.bigdl_export import keras_export
if sys.version >= '3':
long = int
unicode = str
def load_model(model_path, bigdl_type="float"):
from bigdl.dllib.net import Net
model = Net.load(model_path, bigdl_type=bigdl_type)
return model
[docs]@keras_export('bigdl.dllib.keras.Model')
class Model(KerasNet):
"""
Container for a graph model.
# Arguments
input: An input node or a list of input nodes.
output: An output node or a list of output nodes.
name: String to specify the name of the graph model. Default is None.
"""
def __init__(self, input, output, jvalue=None, **kwargs):
super(Model, self).__init__(jvalue,
to_list(input),
to_list(output),
**kwargs)
[docs] def save_graph_topology(self, log_path, backward=False):
"""
Save the current model graph to a folder, which can be displayed in TensorBoard
by running the command:
tensorboard --logdir log_path
# Arguments
log_path: The path to save the model graph.
backward: The name of the application.
"""
callZooFunc(self.bigdl_type, "zooSaveGraphTopology",
self.value,
log_path,
backward)
[docs] def new_graph(self, outputs):
value = callZooFunc(self.bigdl_type, "newGraph", self.value, outputs)
return self.from_jvalue(value)
[docs] def freeze_up_to(self, names):
callZooFunc(self.bigdl_type, "freezeUpTo", self.value, names)
[docs] def unfreeze(self, names):
callZooFunc(self.bigdl_type, "unFreeze", self.value, names)
[docs] @staticmethod
def from_jvalue(jvalue, bigdl_type="float"):
"""
Create a Python Model base on the given java value
:param jvalue: Java object create by Py4j
:return: A Python Model
"""
model = Model([], [], jvalue=jvalue)
model.value = jvalue
return model
[docs]@keras_export('bigdl.dllib.keras.Sequential')
class Sequential(KerasNet):
"""
Container for a sequential model.
# Arguments
name: String to specify the name of the sequential model. Default is None.
>>> sequential = Sequential(name="seq1")
creating: createZooKerasSequential
"""
def __init__(self, jvalue=None, **kwargs):
super(Sequential, self).__init__(jvalue, **kwargs)
# TODO: expose is_built from scala side
[docs] def is_built(self):
try:
self.get_output_shape()
return True
except:
return False
[docs] def add(self, model):
from bigdl.dllib.keras.autograd import Lambda
if (isinstance(model, Lambda)):
if not self.is_built():
if not model.input_shape:
invalidInputError(False, "You should specify inputShape for the first layer")
input_shapes = model.input_shape
else:
input_shapes = self.get_output_shape()
model = model.create(remove_batch(input_shapes))
self.value.add(model.value)
return self
[docs] @staticmethod
def from_jvalue(jvalue, bigdl_type="float"):
"""
Create a Python Model base on the given java value
:param jvalue: Java object create by Py4j
:return: A Python Model
"""
model = Sequential(jvalue=jvalue)
model.value = jvalue
return model