92 lines
3.3 KiB
Python
92 lines
3.3 KiB
Python
"""
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######################## train lenet example ########################
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train lenet and get network model files(.ckpt)
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The training of the intelligent computing network currently supports single dataset training, and does not require
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the obs copy process.It only needs to define two parameters and then call it directly：
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train_dir = '/cache/output' #The location of the output
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data_dir = '/cache/dataset' #The location of the dataset
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"""
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#!/usr/bin/python
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#coding=utf-8
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import os
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import argparse
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from config import mnist_cfg as cfg
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from dataset import create_dataset
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from lenet import LeNet5
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import mindspore.nn as nn
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from mindspore import context
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from mindspore.train.callback import ModelCheckpoint, CheckpointConfig, LossMonitor, TimeMonitor
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from mindspore.train import Model
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from mindspore.nn.metrics import Accuracy
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from mindspore.common import set_seed
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parser = argparse.ArgumentParser(description='MindSpore Lenet Example')
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parser.add_argument(
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'--device_target',
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type=str,
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default="Ascend",
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choices=['Ascend', 'CPU'],
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help='device where the code will be implemented (default: Ascend),if to use the CPU on the Qizhi platform:device_target=CPU')
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parser.add_argument('--epoch_size',
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type=int,
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default=5,
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help='Training epochs.')
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set_seed(1)
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if __name__ == "__main__":
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args, unknown = parser.parse_known_args()
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print('args:')
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print(args)
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###define two parameters and then call it directly###
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train_dir = '/cache/output'
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data_dir = '/cache/dataset'
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###Specifies the device CPU or Ascend NPU used for training###
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context.set_context(mode=context.GRAPH_MODE,
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device_target=args.device_target)
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ds_train = create_dataset(os.path.join(data_dir, "train"),
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cfg.batch_size)
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if ds_train.get_dataset_size() == 0:
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raise ValueError(
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"Please check dataset size > 0 and batch_size <= dataset size")
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network = LeNet5(cfg.num_classes)
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net_loss = nn.SoftmaxCrossEntropyWithLogits(sparse=True, reduction="mean")
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net_opt = nn.Momentum(network.trainable_params(), cfg.lr, cfg.momentum)
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time_cb = TimeMonitor(data_size=ds_train.get_dataset_size())
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if args.device_target != "Ascend":
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model = Model(network,
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net_loss,
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net_opt,
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metrics={"accuracy": Accuracy()})
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else:
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model = Model(network,
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net_loss,
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net_opt,
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metrics={"accuracy": Accuracy()},
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amp_level="O2")
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config_ck = CheckpointConfig(
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save_checkpoint_steps=cfg.save_checkpoint_steps,
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keep_checkpoint_max=cfg.keep_checkpoint_max)
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ckpoint_cb = ModelCheckpoint(prefix="checkpoint_lenet",
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directory=train_dir,
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config=config_ck)
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print("============== Starting Training ==============")
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epoch_size = cfg['epoch_size']
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if (args.epoch_size):
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epoch_size = args.epoch_size
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print('epoch_size is: ', epoch_size)
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model.train(epoch_size,
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ds_train,
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callbacks=[time_cb, ckpoint_cb,
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LossMonitor()])
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print("============== Finish Training ==============") |