def test_WDL(sparse_feature_num, wide_feature_num):
model_name = "WDL"
sample_size = SAMPLE_SIZE
x, y, feature_columns = get_test_data(sample_size, sparse_feature_num, sparse_feature_num)
model = WDL(feature_columns, feature_columns, dnn_hidden_units=[32, 32], dnn_dropout=0.5)
check_model(model, model_name, x, y)
def test_WDL(sparse_feature_num, dense_feature_num):
if version.parse(tf.__version__) >= version.parse('2.0.0'):
return
model_name = "WDL"
sample_size = SAMPLE_SIZE
x, y, feature_columns = get_test_data(sample_size, sparse_feature_num=sparse_feature_num,
dense_feature_num=dense_feature_num, hash_flag=True)
model = WDL(feature_columns, feature_columns,
dnn_hidden_units=[4, 4], dnn_dropout=0.5)
check_model(model, model_name, x, y)
def test_WDL():
name = "WDL"
sample_size = 64
feature_dim_dict = {
'sparse': {
'sparse_1': 2,
'sparse_2': 5,
'sparse_3': 10
},
'dense': ['dense_1', 'dense_2', 'dense_3']
}
sparse_input = [
np.random.randint(0, dim, sample_size)
for dim in feature_dim_dict['sparse'].values()
]
dense_input = [
np.random.random(sample_size) for name in feature_dim_dict['dense']
]
y = np.random.randint(0, 2, sample_size)
x = sparse_input + dense_input
model = WDL(feature_dim_dict,
feature_dim_dict,
hidden_size=[32, 32],
keep_prob=0.5)
model.compile('adam',
'binary_crossentropy',
metrics=['binary_crossentropy'])
model.fit(x + x, y, batch_size=100, epochs=1, validation_split=0.5)
print(name + " test train valid pass!")
model.save_weights(name + '_weights.h5')
model.load_weights(name + '_weights.h5')
print(name + "test save load weight pass!")
save_model(model, name + '.h5')
model = load_model(name + '.h5', custom_objects)
print(name + "test save load model pass!")
print(name + " test pass!")
def test_WDL(sparse_feature_num, wide_feature_num):
model_name = "WDL"
sample_size = SAMPLE_SIZE
feature_dim_dict = {"sparse": [], 'dense': []}
wide_feature_dim_dict = {"sparse": [], 'dense': []}
for name, num in zip(["sparse", "dense"],
[sparse_feature_num, sparse_feature_num]):
if name == "sparse":
for i in range(num):
feature_dim_dict[name].append(
SingleFeat(name + '_' + str(i), np.random.randint(1, 10)))
else:
for i in range(num):
feature_dim_dict[name].append(
SingleFeat(name + '_' + str(i), 0))
for name, num in zip(["sparse", "dense"],
[wide_feature_num, wide_feature_num]):
if name == "sparse":
for i in range(num):
wide_feature_dim_dict[name].append(
SingleFeat(name + 'wide_' + str(i),
np.random.randint(1, 10)))
else:
for i in range(num):
wide_feature_dim_dict[name].append(
SingleFeat(name + 'wide_' + str(i), 0))
sparse_input = [
np.random.randint(0, feat.dimension, sample_size)
for feat in feature_dim_dict['sparse']
]
dense_input = [
np.random.random(sample_size) for _ in feature_dim_dict['dense']
]
wide_sparse_input = [
np.random.randint(0, feat.dimension, sample_size)
for feat in wide_feature_dim_dict['sparse']
]
wide_dense_input = [
np.random.random(sample_size) for _ in wide_feature_dim_dict['dense']
]
y = np.random.randint(0, 2, sample_size)
x = sparse_input + dense_input
x_wide = wide_sparse_input + wide_dense_input
model = WDL(feature_dim_dict,
wide_feature_dim_dict,
dnn_hidden_units=[32, 32],
dnn_dropout=0.5)
check_model(model, model_name, x + x_wide, y)
def test_WDL(sparse_feature_num, wide_feature_num):
model_name = "WDL"
sample_size = 64
feature_dim_dict = {"sparse": {}, 'dense': []}
wide_feature_dim_dict = {"sparse": {}, 'dense': []}
for name, num in zip(["sparse", "dense"],
[sparse_feature_num, sparse_feature_num]):
if name == "sparse":
for i in range(num):
feature_dim_dict[name][name + '_' +
str(i)] = np.random.randint(1, 10)
else:
for i in range(num):
feature_dim_dict[name].append(name + '_' + str(i))
for name, num in zip(["sparse", "dense"],
[wide_feature_num, wide_feature_num]):
if name == "sparse":
for i in range(num):
wide_feature_dim_dict[name][name + 'wide_' +
str(i)] = np.random.randint(1, 10)
else:
for i in range(num):
wide_feature_dim_dict[name].append(name + 'wide_' + str(i))
sparse_input = [
np.random.randint(0, dim, sample_size)
for dim in feature_dim_dict['sparse'].values()
]
dense_input = [
np.random.random(sample_size) for name in feature_dim_dict['dense']
]
wide_sparse_input = [
np.random.randint(0, dim, sample_size)
for dim in wide_feature_dim_dict['sparse'].values()
]
wide_dense_input = [
np.random.random(sample_size)
for name in wide_feature_dim_dict['dense']
]
y = np.random.randint(0, 2, sample_size)
x = sparse_input + dense_input
x_wide = wide_sparse_input + wide_dense_input
model = WDL(feature_dim_dict,
wide_feature_dim_dict,
hidden_size=[32, 32],
keep_prob=0.5)
check_model(model, model_name, x + x_wide, y)
def custom_model():
sparse_features = ["C" + str(i) for i in range(1, 27)]
dense_features = ["I" + str(i) for i in range(1, 14)]
fixlen_feature_columns = [
SparseFeat(
feat,
vocabulary_size=10000,
embedding_dim=4,
dtype="string",
use_hash=True,
) for i, feat in enumerate(sparse_features)
] + [DenseFeat(
feat,
1,
) for feat in dense_features]
model = WDL(fixlen_feature_columns, fixlen_feature_columns, task="binary")
return model
def find_l2_reg_embedding(linear_feature_columns, dnn_feature_columns,
train_model_input, train, test_model_input, test):
cols = ['l2_reg_embedding', 'RMSE', 'MAE', 'MSE', 'AUC']
df_result = pd.DataFrame(columns=cols,
index=range(
len(config.param_rand['l2_reg_embedding'])))
for i, x in enumerate(config.param_rand['l2_reg_embedding']):
##Add dnn_hidden_units as b later
model = WDL(
linear_feature_columns,
dnn_feature_columns,
# ADD LATER
dnn_hidden_units=(2, 2),
l2_reg_linear=0.1,
l2_reg_embedding=x,
l2_reg_dnn=0,
init_std=0.0001,
seed=1024,
task='binary')
model.compile("adam", "mse", metrics=['mse'])
history = model.fit(
train_model_input,
train[target].values,
batch_size=256,
epochs=config.model_epoch['epoch'],
verbose=2,
validation_split=0.2,
)
pred_ans = model.predict(test_model_input, batch_size=256)
auc = roc_auc_score(test[target].values, pred_ans)
df_result.loc[i].l2_reg_embedding = x
df_result.loc[i].RMSE = np.round(
math.sqrt(mean_squared_error(test[target].values, pred_ans)), 3)
df_result.loc[i].MAE = np.round(
mean_absolute_error(test[target].values, pred_ans), 3)
df_result.loc[i].MSE = np.round(
mean_squared_error(test[target].values, pred_ans), 3)
df_result.loc[i].AUC = np.round(auc, 3)
return df_result
def widendeep_model(linear_feature_columns, dnn_feature_columns,
train_model_input, train, test_model_input, test):
cols = ['model', 'RMSE', 'MAE', 'MSE', 'AUC', 'score']
df_result = pd.DataFrame(columns=cols, index=range(1))
model = WDL(
linear_feature_columns,
dnn_feature_columns,
dnn_hidden_units=config.widendeep_att["dnn_hidden_units"],
#l2_reg_linear=config.widendeep_att["l2_reg_linear"],
# l2_reg_embedding=config.widendeep_att["l2_reg_embedding"],
#l2_reg_dnn=config.widendeep_att["l2_reg_dnn"],
# init_std=config.widendeep_att["init_std"],
dnn_dropout=config.widendeep_att['dnn_dropout'],
dnn_activation=config.widendeep_att['dnn_activation'],
seed=config.widendeep_att["seed"],
task=config.widendeep_att["task"])
model.compile("adam", "mse", metrics=['mse'])
history = model.fit(train_model_input,
train[target].values,
batch_size=256,
epochs=config.model_epoch['epoch'],
verbose=2,
validation_split=0.2)
pred_ans = model.predict(test_model_input, batch_size=256)
save_model(model, 'saved_widendeep.h5') # save_model
auc = roc_auc_score(test[target].values, pred_ans)
df_result.loc[0].model = "Wide and Deep"
df_result.loc[0].RMSE = np.round(
math.sqrt(mean_squared_error(test[target].values, pred_ans)), 3)
df_result.loc[0].MAE = np.round(
mean_absolute_error(test[target].values, pred_ans), 3)
df_result.loc[0].MSE = np.round(
mean_squared_error(test[target].values, pred_ans), 3)
df_result.loc[0].AUC = np.round(auc, 3)
return df_result
target = ['rating']
# 对特征标签进行编码
for feature in sparse_features:
lbe = LabelEncoder()
data[feature] = lbe.fit_transform(data[feature])
# 计算每个特征中的 不同特征值的个数
fixlen_feature_columns = [SparseFeat(feature, data[feature].nunique()) for feature in sparse_features]
linear_feature_columns = fixlen_feature_columns
dnn_feature_columns = fixlen_feature_columns
feature_names = get_feature_names(linear_feature_columns + dnn_feature_columns)
# 将数据集切分成训练集和测试集
train, test = train_test_split(data, test_size=0.2)
train_model_input = {name:train[name].values for name in feature_names}
test_model_input = {name:test[name].values for name in feature_names}
# 使用WDL进行训练
model = WDL(linear_feature_columns, dnn_feature_columns, task='regression')
model.compile("adam", "mse", metrics=['mse'], )
history = model.fit(train_model_input, train[target].values, batch_size=256, epochs=100, verbose=True, validation_split=0.2, )
plt.figure()
x = range(len(history.history['loss']))
plt.plot(x, history.history['loss'])
plt.title('loss')
# 使用WDL进行预测
pred_ans = model.predict(test_model_input, batch_size=256)
# 输出RMSE或MSE
mse = round(mean_squared_error(test[target].values, pred_ans), 4)
rmse = mse ** 0.5
print("test RMSE", rmse)
dnn_feature_columns = fixlen_feature_columns
linear_feature_columns = fixlen_feature_columns
feature_names = get_feature_names(linear_feature_columns +
dnn_feature_columns)
# 3.generate input data for model
train, test = train_test_split(data, test_size=0.2)
train_model_input = {name: train[name] for name in feature_names}
test_model_input = {name: test[name] for name in feature_names}
# 4.Define Model,train,predict and evaluate
model = WDL(linear_feature_columns,
dnn_feature_columns,
task='binary',
dnn_hidden_units=(400, 400, 400),
dnn_dropout=0.5)
model.compile(
"adam",
"binary_crossentropy",
metrics=['binary_crossentropy'],
)
history = model.fit(
train_model_input,
train[target].values,
batch_size=256,
epochs=10,
verbose=2,
validation_split=0.2,
fix_len_feature_columns = [
SparseFeat(feature, data[feature].nunique())
for feature in sparse_features
]
linear_feature_columns = fix_len_feature_columns
dnn_feature_columns = fix_len_feature_columns
feature_names = get_feature_names(linear_feature_columns +
dnn_feature_columns)
# 将数据集切分成训练集和测试集
train, test = train_test_split(data, test_size=0.2)
train_set = {name: train[name].values for name in feature_names}
test_set = {name: test[name].values for name in feature_names}
# 使用 WDL 进行训练
model = WDL(linear_feature_columns, dnn_feature_columns, task='regression')
model.compile('adam', 'mse', metrics=['mse'])
history = model.fit(train_set,
train[target].values,
batch_size=256,
epochs=1,
verbose=True,
validation_split=0.2)
# 使用 WDL 进行预测
pred_ans = model.predict(test_set, batch_size=256)
# 输出 RMSE 或者 MSE
mse = round(mean_squared_error(test[target].values, pred_ans), 4)
rmse = mse**0.5
print(f'test rmse: {rmse}')
if model_type == "xDeepFM":
model = xDeepFM(
linear_feature_columns,
dnn_feature_columns,
task="binary",
embedding_size=emb_dim,
dnn_hidden_units=[400, 400],
cin_layer_size=[200, 200, 200],
)
if model_type == "WDL":
model = WDL(
linear_feature_columns,
dnn_feature_columns,
task="binary",
embedding_size=emb_dim,
dnn_hidden_units=[1024, 512, 256],
)
if model_type == "DCN":
model = DCN(
dnn_feature_columns,
task="binary",
embedding_size=emb_dim,
dnn_hidden_units=[1024, 1024],
cross_num=6,
)
if opt == "adagrad":
optimizer = Adagrad
for feat in sparse_features:
lbe = LabelEncoder()
data[feat] = lbe.fit_transform(data[feat])
# 2.count #unique features for each sparse field
sparse_feature_dim = {
feat: data[feat].nunique()
for feat in sparse_features
}
# 3.generate input data for model
model_input = [data[feat].values for feat in sparse_feature_dim]
if mode == 'train':
# 4.Define Model,compile and train
model = WDL({
"sparse": sparse_feature_dim,
"dense": []
},
final_activation='sigmoid')
model.compile("adam",
"binary_crossentropy",
metrics=['binary_crossentropy'])
filepath = 'model_save/wdl_sample-ep{epoch:03d}-loss{loss:.3f}-val_loss{val_loss:.3f}.h5'
checkpoint = ModelCheckpoint(filepath,
monitor='val_loss',
verbose=1,
save_best_only=True,
mode='min')
history = model.fit(
length_name='seq_length')
]
behavior_feature_list = ['itemId', 'category']
if sys.argv[1] == 'DeepFM_UDG':
model = DeepFM_UDG(linear_feature_columns, dnn_feature_columns, untrainable_features_columns,
(200, 80), uid_feature_name=udg_features, udg_embedding_size=int(sys.argv[5]))
elif sys.argv[1] == 'DeepFM':
model = DeepFM(linear_feature_columns, dnn_feature_columns, [], (200, 80))
elif sys.argv[1] == 'PNN_UDG':
model = PNN_UDG(dnn_feature_columns, untrainable_features_columns, (200, 80), uid_feature_name=udg_features,
udg_embedding_size=int(sys.argv[5]))
elif sys.argv[1] == 'PNN':
model = PNN(dnn_feature_columns, untrainable_features_columns, (200, 80))
elif sys.argv[1] == 'WDL':
model = WDL(linear_feature_columns, dnn_feature_columns, [], (200, 80))
elif sys.argv[1] == 'WDL_UDG':
model = WDL_UDG(linear_feature_columns, dnn_feature_columns, untrainable_features_columns, (200, 80), uid_feature_name=udg_features, udg_embedding_size=int(sys.argv[5]))
elif sys.argv[1] == 'DIEN':
model = DIEN(fixlen_feature_columns, behavior_feature_list,
dnn_hidden_units=[200, 80], dnn_dropout=0, gru_type="AUGRU", use_negsampling=True)
elif sys.argv[1] == 'DIEN_UDG':
model = DIEN_UDG(fixlen_feature_columns, untrainable_features_columns, behavior_feature_list, dnn_hidden_units=[200, 80], dnn_dropout=0, gru_type="AUGRU", use_negsampling=True, uid_feature_name=udg_features, udg_embedding_size=int(sys.argv[5]))
elif sys.argv[1] == 'DIN':
model = DIN(fixlen_feature_columns, behavior_feature_list, dnn_hidden_units=[200, 80], dnn_dropout=0)
elif sys.argv[1] == 'DIN_UDG':
model = DIN_UDG(fixlen_feature_columns, untrainable_features_columns, behavior_feature_list, dnn_hidden_units=[200, 80], dnn_dropout=0, uid_feature_name=udg_features, udg_embedding_size=int(sys.argv[5]))
if sys.argv[4] == 'focal':
model.compile("adam", loss=focal_loss, metrics=['binary_crossentropy'], )
else:
train_model_input['genres'] = genres_list[:len(train), :]
test_model_input['genres'] = genres_list[len(train):, :]
target = ['rating']
# callback
from tensorflow.keras.callbacks import EarlyStopping, TensorBoard
callbacks = [EarlyStopping(monitor='val_loss', patience=3, min_delta=1e-2)]
# 6,建立模型
model = WDL(
linear_feature_columns,
dnn_feature_columns,
task='regression',
l2_reg_linear=1e-5,
l2_reg_embedding=1e-5,
l2_reg_dnn=0.01,
init_std=0.0001,
dnn_hidden_units=(256, 128),
seed=1024,
dnn_dropout=0,
dnn_activation='relu',
)
model.summary()
# 可以进行调优
from tensorflow.keras.optimizers import Adam
optmizer = Adam(1e-4)
model.compile(
optmizer,
"mse",
metrics=['mse'],
