Add DeepCF model

test=develop

python/paddle/fluid/tests/unittests/test_imperative_deepcf.py

+# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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 unittest
+import numpy as np
+import random
+import sys
+
+import paddle
+import paddle.fluid as fluid
+import paddle.fluid.core as core
+from test_imperative_base import new_program_scope
+from paddle.fluid.imperative.base import to_variable
+
+NUM_USERS = 100
+NUM_ITEMS = 1000
+
+BATCH_SIZE = 32
+NUM_BATCHES = 2
+
+
+class MLP(fluid.imperative.Layer):
+    def __init__(self, name_scope):
+        super(MLP, self).__init__(name_scope)
+        self._user_latent = fluid.imperative.FC(self.full_name(), 256)
+        self._item_latent = fluid.imperative.FC(self.full_name(), 256)
+
+        self._user_layers = []
+        self._item_layers = []
+        self._hid_sizes = [128, 64]
+        for i in range(len(self._hid_sizes)):
+            self._user_layers.append(
+                self.add_sublayer(
+                    'user_layer_%d' % i,
+                    fluid.imperative.FC(
+                        self.full_name(), self._hid_sizes[i], act='relu')))
+            self._item_layers.append(
+                self.add_sublayer(
+                    'item_layer_%d' % i,
+                    fluid.imperative.FC(
+                        self.full_name(), self._hid_sizes[i], act='relu')))
+
+    def forward(self, users, items):
+        users = self._user_latent(users)
+        items = self._item_latent(items)
+
+        for ul, il in zip(self._user_layers, self._item_layers):
+            users = ul(users)
+            items = il(items)
+        return fluid.layers.elementwise_mul(users, items)
+
+
+class DMF(fluid.imperative.Layer):
+    def __init__(self, name_scope):
+        super(DMF, self).__init__(name_scope)
+        self._user_latent = fluid.imperative.FC(self.full_name(), 256)
+        self._item_latent = fluid.imperative.FC(self.full_name(), 256)
+        self._match_layers = []
+        self._hid_sizes = [128, 64]
+        for i in range(len(self._hid_sizes)):
+            self._match_layers.append(
+                self.add_sublayer(
+                    'match_layer_%d' % i,
+                    fluid.imperative.FC(
+                        self.full_name(), self._hid_sizes[i], act='relu')))
+        self._mat
+
+    def forward(self, users, items):
+        users = self._user_latent(users)
+        items = self._item_latent(items)
+        match_vec = fluid.layers.concat(
+            [users, items], axis=len(users.shape) - 1)
+        for l in self._match_layers:
+            match_vec = l(match_vec)
+        return match_vec
+
+
+class DeepCF(fluid.imperative.Layer):
+    def __init__(self, name_scope):
+        super(DeepCF, self).__init__(name_scope)
+
+        self._user_emb = fluid.imperative.Embedding(self.full_name(),
+                                                    [NUM_USERS, 256])
+        self._item_emb = fluid.imperative.Embedding(self.full_name(),
+                                                    [NUM_ITEMS, 256])
+
+        self._mlp = MLP(self.full_name())
+        self._dmf = DMF(self.full_name())
+        self._match_fc = fluid.imperative.FC(self.full_name(), 1, act='sigmoid')
+
+    def forward(self, users, items):
+        users_emb = self._user_emb(users)
+        items_emb = self._item_emb(items)
+
+        mlp_predictive = self._mlp(users_emb, items_emb)
+        dmf_predictive = self._dmf(users_emb, items_emb)
+        predictive = fluid.layers.concat(
+            [mlp_predictive, dmf_predictive],
+            axis=len(mlp_predictive.shape) - 1)
+        prediction = self._match_fc(predictive)
+        return prediction
+
+
+def get_data():
+    user_ids = []
+    item_ids = []
+    labels = []
+    for uid in range(NUM_USERS):
+        for iid in range(NUM_ITEMS):
+            # 10% positive
+            label = float(random.randint(1, 10) == 1)
+            user_ids.append(uid)
+            item_ids.append(iid)
+            labels.append(label)
+    indices = np.arange(NUM_USERS * NUM_ITEMS)
+    np.random.shuffle(indices)
+    users_np = np.array(user_ids, dtype=np.int64)[indices]
+    items_np = np.array(item_ids, dtype=np.int64)[indices]
+    labels_np = np.array(labels, dtype=np.float32)[indices]
+    return np.expand_dims(users_np, -1), \
+           np.expand_dims(items_np, -1), \
+           np.expand_dims(labels_np, -1)
+
+
+class TestImperativeDeepCF(unittest.TestCase):
+    def test_gan_float32(self):
+        seed = 90
+        users_np, items_np, labels_np = get_data()
+
+        startup = fluid.Program()
+        startup.random_seed = seed
+        main = fluid.Program()
+        main.random_seed = seed
+
+        scope = fluid.core.Scope()
+        with new_program_scope(main=main, startup=startup, scope=scope):
+            users = fluid.layers.data('users', [1], dtype='int64')
+            items = fluid.layers.data('items', [1], dtype='int64')
+            labels = fluid.layers.data('labels', [1], dtype='float32')
+
+            deepcf = DeepCF('deepcf')
+            prediction = deepcf(users, items)
+            loss = fluid.layers.reduce_sum(
+                fluid.layers.log_loss(prediction, labels))
+            adam = fluid.optimizer.AdamOptimizer(0.01)
+            adam.minimize(loss)
+
+            exe = fluid.Executor(fluid.CPUPlace(
+            ) if not core.is_compiled_with_cuda() else fluid.CUDAPlace(0))
+            exe.run(startup)
+            for slice in range(0, BATCH_SIZE * NUM_BATCHES, BATCH_SIZE):
+                static_loss = exe.run(
+                    main,
+                    feed={
+                        users.name: users_np[slice:slice + BATCH_SIZE],
+                        items.name: items_np[slice:slice + BATCH_SIZE],
+                        labels.name: labels_np[slice:slice + BATCH_SIZE]
+                    },
+                    fetch_list=[loss])[0]
+                sys.stderr.write('static loss %s\n' % static_loss)
+
+        with fluid.imperative.guard():
+            fluid.default_startup_program().random_seed = seed
+            fluid.default_main_program().random_seed = seed
+
+            deepcf = DeepCF('deepcf')
+            for slice in range(0, BATCH_SIZE * NUM_BATCHES, BATCH_SIZE):
+                prediction = deepcf(
+                    to_variable(users_np[slice:slice + BATCH_SIZE]),
+                    to_variable(items_np[slice:slice + BATCH_SIZE]))
+                loss = fluid.layers.reduce_sum(
+                    fluid.layers.log_loss(prediction,
+                                          to_variable(labels_np[slice:slice +
+                                                                BATCH_SIZE])))
+                loss._backward()
+                adam = fluid.optimizer.AdamOptimizer(0.01)
+                adam.minimize(loss)
+                deepcf.clear_gradients()
+                dy_loss = loss._numpy()
+
+        self.assertEqual(static_loss, dy_loss)
+
+
+if __name__ == '__main__':
+    unittest.main()

python/paddle/fluid/tests/unittests/test_imperative_gan.py

@@ -51,7 +51,7 @@ class Generator(fluid.imperative.Layer):
         return self._fc3(x)
 
 
-class TestImperativeMnist(unittest.TestCase):
+class TestImperativeGAN(unittest.TestCase):
     def test_gan_float32(self):
         seed = 90