"add dynamic lstm scripts"

paddle/understand_sentiment_dynamic_lstm.py

@@ -0,0 +1,154 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import numpy as np
+import argparse
+import time
+
+import paddle.v2 as paddle
+import paddle.v2.fluid as fluid
+import paddle.v2.fluid.profiler as profiler
+
+
+def parse_args():
+    parser = argparse.ArgumentParser("LSTM model benchmark.")
+    parser.add_argument(
+        '--batch_size', type=int, default=32, help='The minibatch size.')
+    parser.add_argument(
+        '--stacked_num', type=int, default=3, help='Stacked LSTM Layer size.')
+    parser.add_argument(
+        '--emb_dim', type=int, default=32, help='The embedding dim.')
+    parser.add_argument(
+        '--hid_dim',
+        type=int,
+        default=32,
+        help='The sequence length of one sentence.')
+    parser.add_argument(
+        '--iterations', type=int, default=35, help='The number of minibatches.')
+    parser.add_argument(
+        '--pass_num', type=int, default=100, help='The number of passes.')
+    parser.add_argument(
+        '--device',
+        type=str,
+        default='CPU',
+        choices=['CPU', 'GPU'],
+        help='The device type.')
+    parser.add_argument(
+        '--infer_only', action='store_true', help='If set, run forward only.')
+    parser.add_argument(
+        '--use_cprof', action='store_true', help='If set, use cProfile.')
+    parser.add_argument(
+        '--use_nvprof',
+        action='store_false',
+        help='If set, use nvprof for CUDA.')
+    args = parser.parse_args()
+    return args
+
+
+def print_arguments(args):
+    print('-----------  Configuration Arguments -----------')
+    for arg, value in sorted(vars(args).iteritems()):
+        print('%s: %s' % (arg, value))
+    print('------------------------------------------------')
+
+
+def dynamic_lstm_model(data, dict_dim, class_dim=2):
+    batch_size = args.batch_size
+    emb_dim = args.emb_dim
+    hid_dim = args.hid_dim
+    stacked_num = args.stacked_num
+
+    emb = fluid.layers.embedding(input=data, size=[dict_dim, emb_dim])
+
+    inputs = emb
+
+    for i in range(stacked_num):
+        fc = fluid.layers.fc(input=inputs, size=hid_dim)
+        lstm, cell = fluid.layers.dynamic_lstm(input=fc, size=hid_dim)
+        inputs = lstm
+    lstm_last = fluid.layers.sequence_pool(input=inputs, pool_type='max')
+
+    prediction = fluid.layers.fc(input=[lstm_last],
+                                 size=class_dim,
+                                 act='softmax')
+
+    return prediction
+
+
+def to_lodtensor(data, place):
+    seq_lens = [len(seq) for seq in data]
+    cur_len = 0
+    lod = [cur_len]
+    for l in seq_lens:
+        cur_len += l
+        lod.append(cur_len)
+    flattened_data = np.concatenate(data, axis=0).astype("int64")
+    flattened_data = flattened_data.reshape([len(flattened_data), 1])
+    res = fluid.LoDTensor()
+    res.set(flattened_data, place)
+    res.set_lod([lod])
+    return res
+
+
+def run_benchmark(model, args):
+    if args.use_cprof:
+        pr = cProfile.Profile()
+        pr.enable()
+    start_time = time.time()
+    word_dict = paddle.dataset.imdb.word_dict()
+
+    print("load word dict successfully")
+
+    dict_dim = len(word_dict)
+
+    data = fluid.layers.data(
+        name="words", shape=[1], dtype="int64", lod_level=1)
+    label = fluid.layers.data(name="label", shape=[1], dtype="int64")
+
+    prediction = model(data, dict_dim)
+    cost = fluid.layers.cross_entropy(input=prediction, label=label)
+    avg_cost = fluid.layers.mean(x=cost)
+    adam_optimizer = fluid.optimizer.Adam(learning_rate=0.002)
+    adam_optimizer.minimize(avg_cost)
+    accuracy = fluid.evaluator.Accuracy(input=prediction, label=label)
+
+    train_reader = paddle.batch(
+        paddle.reader.shuffle(
+            paddle.dataset.imdb.train(word_dict), buf_size=25000),
+        batch_size=args.batch_size)
+    place = fluid.CPUPlace() if args.device == 'CPU' else fluid.GPUPlace(0)
+    exe = fluid.Executor(place)
+    exe.run(fluid.default_startup_program())
+
+    for it, pass_id in enumerate(xrange(args.pass_num)):
+        accuracy.reset(exe)
+        if iter == args.iterations:
+            break
+        for data in train_reader():
+            tensor_words = to_lodtensor(map(lambda x: x[0], data), place)
+
+            label = np.array(map(lambda x: x[1], data)).astype("int64")
+            label = label.reshape([args.batch_size, 1])
+
+            tensor_label = fluid.LoDTensor()
+            tensor_label.set(label, place)
+
+            loss, acc = exe.run(
+                fluid.default_main_program(),
+                feed={"words": tensor_words,
+                      "label": tensor_label},
+                fetch_list=[avg_cost] + accuracy.metrics)
+            pass_acc = accuracy.eval(exe)
+            print("Iter: %d, loss: %s, acc: %s, pass_acc: %s" %
+                  (it, str(loss), str(acc), str(pass_acc)))
+
+
+if __name__ == '__main__':
+    args = parse_args()
+    print_arguments(args)
+    if args.use_nvprof and args.device == 'GPU':
+        with profiler.cuda_profiler("cuda_profiler.txt", 'csv') as nvprof:
+            run_benchmark(dynamic_lstm_model, args)
+    else:
+        run_benchmark(dynamic_lstm_model, args)