PaddlePaddle 2.1.1代码规范

1# -*- coding:utf-8 -*-
2""" paddle train demo """
3import os
4import numpy as np
5import paddle # 导入paddle模块
6import paddle.fluid as fluid
7import gzip
8import struct
9import argparse
10import time
11from rudder_autosearch.sdk.amaas_tools import AMaasTools
12
13def parse_arg():
14    """parse arguments"""
15    parser = argparse.ArgumentParser(description='paddle2.1.1 mnist Example')
16    parser.add_argument('--train_dir', type=str, default='./train_data',
17                        help='input data dir for training (default: ./train_data)')
18    parser.add_argument('--test_dir', type=str, default='./test_data',
19                        help='input data dir for test (default: ./test_data)')
20    parser.add_argument('--output_dir', type=str, default='./output',
21                        help='output dir for auto_search job (default: ./output)')
22    parser.add_argument('--job_id', type=str, default="job-1234",
23                        help='auto_search job id (default: "job-1234")')
24    parser.add_argument('--trial_id', type=str, default="0-0",
25                        help='auto_search id of a single trial (default: "0-0")')
26    parser.add_argument('--metric', type=str, default="acc",
27                        help='evaluation metric of the model')
28    parser.add_argument('--data_sampling_scale', type=float, default=1.0,
29                        help='sampling ratio of the data (default: 1.0)')
30    parser.add_argument('--batch_size', type=int, default=64,
31                        help='number of images input in an iteration (default: 64)')
32    parser.add_argument('--lr', type=float, default=0.001,
33                        help='learning rate of the training (default: 0.001)')
34    parser.add_argument('--epoch', type=int, default=5,
35                        help='number of epochs to train (default: 5)')
36    args = parser.parse_args()
37    args.output_dir = os.path.join(args.output_dir, args.job_id, args.trial_id)
38    if not os.path.exists(args.output_dir):
39        os.makedirs(args.output_dir)
40    print("job_id: {}, trial_id: {}".format(args.job_id, args.trial_id))
41    return args
42
43def load_data(file_dir, is_train=True):
44    """
45    :param file_dir:
46    :param is_train:
47    :return:
48    """
49    if is_train:
50        image_path = file_dir + '/train-images-idx3-ubyte.gz'
51        label_path = file_dir + '/train-labels-idx1-ubyte.gz'
52    else:
53        image_path = file_dir + '/t10k-images-idx3-ubyte.gz'
54        label_path = file_dir + '/t10k-labels-idx1-ubyte.gz'
55    with open(image_path.replace('.gz', ''), 'wb') as out_f, gzip.GzipFile(image_path) as zip_f:
56        out_f.write(zip_f.read())
57        # os.unlink(image_path)
58    with open(label_path.replace('.gz', ''), 'wb') as out_f, gzip.GzipFile(label_path) as zip_f:
59        out_f.write(zip_f.read())
60        # os.unlink(label_path)
61    with open(label_path[:-3], 'rb') as lbpath:
62        magic, n = struct.unpack('>II', lbpath.read(8))
63        labels = np.fromfile(lbpath, dtype=np.uint8)
64    with open(image_path[:-3], 'rb') as imgpath:
65        magic, num, rows, cols = struct.unpack('>IIII', imgpath.read(16))
66        images = np.fromfile(imgpath, dtype=np.uint8).reshape(len(labels), 784)
67    return images, labels
68
69def reader_creator(file_dir, is_train=True, buffer_size=100, data_sampling_scale=1):
70    """
71    :param file_dir:
72    :param is_train:
73    :param buffer_size:
74    :return:
75    """
76    images, labels = load_data(file_dir, is_train)
77    if is_train:
78        np.random.seed(0)
79        sample_data_num = int(data_sampling_scale * len(images))
80        idx = np.arange(len(images))
81        np.random.shuffle(idx)
82        images, labels = images[0:sample_data_num], labels[0:sample_data_num]
83    def reader():
84        """
85        :return:
86        """
87        for num in range(int(len(labels) / buffer_size)):
88            for i in range(buffer_size):
89                yield images[num * buffer_size + i, :], int(labels[num * buffer_size + i])
90    return reader
91
92def reader_load(args):
93    """reader_load"""
94    # 每次读取训练集中的500个数据并随机打乱，传入batched reader中，batched reader 每次 yield args.batch_size个数据
95    train_reader = paddle.batch(
96        paddle.reader.shuffle(
97            reader_creator(args.train_dir, is_train=True, buffer_size=100,
98                           data_sampling_scale=args.data_sampling_scale), buf_size=500),
99        batch_size=args.batch_size)
100    # 读取测试集的数据，每次 yield 64个数据
101    test_reader = paddle.batch(
102        reader_creator(args.test_dir, is_train=False, buffer_size=100), batch_size=args.batch_size)
103    return train_reader, test_reader
104
105def softmax_regression():
106    """
107    定义softmax分类器：
108        一个以softmax为激活函数的全连接层
109    Return:
110        predict_image -- 分类的结果
111    """
112    # 输入的原始图像数据，大小为28*28*1
113    img = fluid.layers.data(name='img', shape=[1, 28, 28], dtype='float32')
114    # 以softmax为激活函数的全连接层，输出层的大小必须为数字的个数10
115    predict = fluid.layers.fc(
116        input=img, size=10, act='softmax')
117    return predict
118
119def multilayer_perceptron():
120    """
121    定义多层感知机分类器：
122        含有两个隐藏层（全连接层）的多层感知器
123        其中前两个隐藏层的激活函数采用 ReLU，输出层的激活函数用 Softmax
124    Return:
125        predict_image -- 分类的结果
126    """
127    # 输入的原始图像数据，大小为28*28*1
128    img = fluid.layers.data(name='img', shape=[1, 28, 28], dtype='float32')
129    # 第一个全连接层，激活函数为ReLU
130    hidden = fluid.layers.fc(input=img, size=200, act='relu')
131    # 第二个全连接层，激活函数为ReLU
132    hidden = fluid.layers.fc(input=hidden, size=200, act='relu')
133    # 以softmax为激活函数的全连接输出层，输出层的大小必须为数字的个数10
134    prediction = fluid.layers.fc(input=hidden, size=10, act='softmax')
135    return prediction
136
137def convolutional_neural_network():
138    """
139    定义卷积神经网络分类器：
140        输入的二维图像，经过两个卷积-池化层，使用以softmax为激活函数的全连接层作为输出层
141    Return:
142        predict -- 分类的结果
143    """
144    # 输入的原始图像数据，大小为28*28*1
145    img = fluid.layers.data(name='img', shape=[1, 28, 28], dtype='float32')
146    # 第一个卷积-池化层
147    # 使用20个5*5的滤波器，池化大小为2，池化步长为2，激活函数为Relu
148    conv_pool_1 = fluid.nets.simple_img_conv_pool(
149        input=img,
150        filter_size=5,
151        num_filters=20,
152        pool_size=2,
153        pool_stride=2,
154        act="relu")
155    conv_pool_1 = fluid.layers.batch_norm(conv_pool_1)
156    # 第二个卷积-池化层
157    # 使用20个5*5的滤波器，池化大小为2，池化步长为2，激活函数为Relu
158    conv_pool_2 = fluid.nets.simple_img_conv_pool(
159        input=conv_pool_1,
160        filter_size=5,
161        num_filters=50,
162        pool_size=2,
163        pool_stride=2,
164        act="relu")
165    # 以softmax为激活函数的全连接输出层，输出层的大小必须为数字的个数10
166    prediction = fluid.layers.fc(input=conv_pool_2, size=10, act='softmax')
167    return prediction
168
169def train_program():
170    """
171    配置train_program
172    Return:
173        predict -- 分类的结果
174        avg_cost -- 平均损失
175        acc -- 分类的准确率
176    """
177    paddle.enable_static()
178    # 标签层，名称为label,对应输入图片的类别标签
179    label = fluid.layers.data(name='label', shape=[1], dtype='int64')
180    # predict = softmax_regression() # 取消注释将使用 Softmax回归
181    # predict = multilayer_perceptron() # 取消注释将使用 多层感知器
182    predict = convolutional_neural_network() # 取消注释将使用 LeNet5卷积神经网络
183    # 使用类交叉熵函数计算predict和label之间的损失函数
184    cost = fluid.layers.cross_entropy(input=predict, label=label)
185    # 计算平均损失
186    avg_cost = fluid.layers.mean(cost)
187    # 计算分类准确率
188    acc = fluid.layers.accuracy(input=predict, label=label)
189    return predict, [avg_cost, acc]
190
191def optimizer_program():
192    """
193    :return:
194    """
195    return fluid.optimizer.Adam(learning_rate=0.001)
196
197def event_handler(pass_id, batch_id, cost):
198    """event_handler"""
199    # 打印训练的中间结果，训练轮次，batch数，损失函数
200    print("Pass %d, Batch %d, Cost %f" % (pass_id, batch_id, cost))
201
202def train_test(train_test_program,
203                   train_test_feed, train_test_reader, executor, fetch_list):
204    """train_test"""
205    # 将分类准确率存储在acc_set中
206    acc_set = []
207    # 将平均损失存储在avg_loss_set中
208    avg_loss_set = []
209    # 将测试 reader yield 出的每一个数据传入网络中进行训练
210    for test_data in train_test_reader():
211        avg_loss_np, acc_np = executor.run(
212            program=train_test_program,
213            feed=train_test_feed.feed(test_data),
214            fetch_list=fetch_list)
215        acc_set.append(float(acc_np))
216        avg_loss_set.append(float(avg_loss_np))
217    # 获得测试数据上的准确率和损失值
218    acc_val_mean = np.array(acc_set).mean()
219    avg_loss_val_mean = np.array(avg_loss_set).mean()
220    # 返回平均损失值，平均准确率
221    return avg_loss_val_mean, acc_val_mean
222
223class Model():
224    def __init__(self, args, train_reader, test_reader):
225        self.args = args
226        self.create_model()
227        self.train_reader = train_reader
228        self.test_reader = test_reader
229
230    def create_model(self):
231        """create_model"""
232        # 该模型运行在单个CPU上
233        self.place = fluid.CPUPlace()
234        # 调用train_program 获取预测值，损失值
235        self.prediction, [self.avg_loss, self.acc] = train_program()
236        # 输入的原始图像数据，大小为28*28*1
237        img = fluid.layers.data(name='img', shape=[1, 28, 28], dtype='float32')
238        # 标签层，名称为label,对应输入图片的类别标签
239        label = fluid.layers.data(name='label', shape=[1], dtype='int64')
240        # 告知网络传入的数据分为两部分，第一部分是img值，第二部分是label值
241        self.feeder = fluid.DataFeeder(feed_list=[img, label], place=self.place)
242        # 选择Adam优化器
243        optimizer = fluid.optimizer.Adam(learning_rate=self.args.lr)
244        optimizer.minimize(self.avg_loss)
245
246    def run_train(self):
247        PASS_NUM = self.args.epoch
248        epochs = [epoch_id for epoch_id in range(PASS_NUM)]
249
250        self.exe = fluid.Executor(self.place)
251        self.exe.run(fluid.default_startup_program())
252        main_program = fluid.default_main_program()
253        step = 0
254        for epoch_id in epochs:
255            print("Epoch %d:" % (epoch_id))
256            for step_id, data in enumerate(self.train_reader()):
257                metrics = self.exe.run(main_program,
258                                  feed=self.feeder.feed(data),
259                                  fetch_list=[self.avg_loss, self.acc])
260                if step % 100 == 0:  # 每训练100次 更新一次图片
261                    event_handler(step, epoch_id, metrics[0])
262                step += 1
263
264    def save_model(self):
265        """save_model"""
266        # 将模型参数存储在名为 save_dirname 的文件中
267        save_dirname = self.args.output_dir
268        fluid.io.save_inference_model(save_dirname,
269                                      ["img"], [self.prediction], self.exe,
270                                      model_filename='model',
271                                      params_filename='params')
272
273    def evaluate(self):
274        """evaluate"""
275        test_program = fluid.default_main_program().clone(for_test=True)
276        avg_loss_val, acc_val = train_test(train_test_program=test_program,
277                                           train_test_reader=self.test_reader,
278                                           train_test_feed=self.feeder,
279                                           executor=self.exe,
280                                           fetch_list=[self.avg_loss, self.acc])
281        print("accuracy: %f" % acc_val)
282        return acc_val
283
284def report_final(args, metric):
285    """report_final_result"""
286    # 结果上报sdk
287    amaas_tools = AMaasTools(args.job_id, args.trial_id)
288    metric_dict = {args.metric: metric}
289    for i in range(3):
290        flag, ret_msg = amaas_tools.report_final_result(metric=metric_dict,
291                                                             export_model_path=args.output_dir,
292                                                             checkpoint_path="")
293        print("End Report, metric:{}, ret_msg:{}".format(metric, ret_msg))
294        if flag:
295            break
296        time.sleep(1)
297    assert flag, "Report final result to manager failed! Please check whether manager'address or manager'status " \
298                 "is ok! "
299
300def main():
301    """main"""
302    # 获取参数
303    args = parse_arg()
304    # 加载数据集
305    train_reader, test_reader = reader_load(args)
306    # 模型定义
307    model = Model(args, train_reader, test_reader)
308    # 模型训练
309    model.run_train()
310    # 模型保存
311    model.save_model()
312    # 模型评估
313    acc = model.evaluate()
314    # 上报结果
315    report_final(args, metric=acc)
316
317if __name__ == '__main__':
318    main()

1#搜索算法参数
2search_strategy:
3  algo: PARTICLE_SEARCH #搜索策略：粒子群算法
4  params:
5    population_num: 8 #种群个体数量 ｜ [1,10] int类型
6    round: 10 #迭代轮数  ｜[5,50] int类型
7    inertia_weight: 0.5 # 惯性权重  ｜(0，1] float类型
8    global_acceleration: 1.5 #全局加速度 ｜(0,4] float类型
9    local_acceleration: 1.5 #个体加速度  ｜(0,4] float类型
10
11#单次训练时数据的采样比例，单位%
12data_sampling_scale: 100 #｜（0，100] int类型
13
14#评价指标参数
15metrics:
16  name: acc #评价指标  ｜ 任意字符串 str类型
17  goal: MAXIMIZE #最大值/最小值 ｜ str类型   MAXIMIZE or MINIMIZE   必须为这两个之一（也即支持大写）
18  expected_value: 100 #早停标准值，评价指标超过该值则结束整个超参搜索，单位%  ｜无限制 int类型
19
20#搜索参数空间
21search_space:
22  batch_size:
23    htype: choice
24    value: [64, 128, 256, 512]
25  lr:
26    htype: loguniform
27    value: [0.0001, 0.1]
28  epoch:
29    htype: choice
30    value: [1, 5, 10]