train.py 3.8 KB
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# Copyright (c) 2020 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.

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import os
import sys
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__dir__ = os.path.dirname(os.path.abspath(__file__))
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sys.path.append(__dir__)
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sys.path.append(os.path.abspath(os.path.join(__dir__, '..')))
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import yaml
import paddle
import paddle.distributed as dist
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paddle.seed(2)
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from ppocr.data import build_dataloader
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from ppocr.modeling.architectures import build_model
from ppocr.losses import build_loss
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from ppocr.optimizer import build_optimizer
from ppocr.postprocess import build_post_process
from ppocr.metrics import build_metric
from ppocr.utils.save_load import init_model
import tools.program as program
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dist.get_world_size()
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def main(config, device, logger, vdl_writer):
    # init dist environment
    if config['Global']['distributed']:
        dist.init_parallel_env()
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    global_config = config['Global']
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    # build dataloader
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    train_dataloader = build_dataloader(config, 'Train', device, logger)
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    if config['Eval']:
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        valid_dataloader = build_dataloader(config, 'Eval', device, logger)
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    else:
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        valid_dataloader = None

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    # build post process
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    post_process_class = build_post_process(config['PostProcess'],
                                            global_config)

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    # build model
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    # for rec algorithm
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    if hasattr(post_process_class, 'character'):
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        char_num = len(getattr(post_process_class, 'character'))
        config['Architecture']["Head"]['out_channels'] = char_num
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    model = build_model(config['Architecture'])
    if config['Global']['distributed']:
        model = paddle.DataParallel(model)

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    # build loss
    loss_class = build_loss(config['Loss'])
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    # build optim
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    optimizer, lr_scheduler = build_optimizer(
        config['Optimizer'],
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        epochs=config['Global']['epoch_num'],
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        step_each_epoch=len(train_dataloader),
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        parameters=model.parameters())

    # build metric
    eval_class = build_metric(config['Metric'])
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    # load pretrain model
    pre_best_model_dict = init_model(config, model, logger, optimizer)
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    logger.info('train dataloader has {} iters, valid dataloader has {} iters'.
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                format(len(train_dataloader), len(valid_dataloader)))
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    # start train
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    program.train(config, train_dataloader, valid_dataloader, device, model,
                  loss_class, optimizer, lr_scheduler, post_process_class,
                  eval_class, pre_best_model_dict, logger, vdl_writer)
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def test_reader(config, device, logger):
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    loader = build_dataloader(config, 'Train', device, logger)
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    import time
    starttime = time.time()
    count = 0
    try:
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        for data in loader():
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            count += 1
            if count % 1 == 0:
                batch_time = time.time() - starttime
                starttime = time.time()
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                logger.info("reader: {}, {}, {}".format(
                    count, len(data[0]), batch_time))
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    except Exception as e:
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        logger.info(e)
    logger.info("finish reader: {}, Success!".format(count))
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if __name__ == '__main__':
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    config, device, logger, vdl_writer = program.preprocess(is_train=True)
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    main(config, device, logger, vdl_writer)
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    # test_reader(config, device, logger)