train_log.py

# coding:utf8
import torch
from torch.autograd import Variable
import time
import os

from utils import AverageMeter, calculate_accuracy


def train_epoch(epoch, data_loader, model, criterion, optimizer, opt, epoch_logger, batch_logger):
    print('train at epoch {}'.format(epoch))

    model.train()

    batch_time = AverageMeter()
    data_time = AverageMeter()
    losses = AverageMeter()
    accuracies = AverageMeter()
    end_time = time.time()

    for i, (inputs, targets) in enumerate(data_loader):

        data_time.update(time.time() - end_time)
        if opt.cuda:
            targets = targets.cuda(async=True)
        inputs = Variable(inputs)
        targets = Variable(targets)
        outputs = model(inputs.cuda())

        loss = criterion(outputs, targets)
        acc = calculate_accuracy(outputs, targets)

        losses.update(loss.item(), inputs.size(0))
        accuracies.update(acc, inputs.size(0))

        optimizer.zero_grad()
        loss.backward()
        optimizer.step()

        batch_time.update(time.time() - end_time)
        end_time = time.time()

        batch_logger.log({
            'epoch': epoch,
            'batch': i + 1,
            'iter': (epoch - 1) * len(data_loader) + (i + 1),
            'loss': losses.val,
            'acc': accuracies.val,
            'lr': optimizer.param_groups[0]['lr']
        })

        print('Epoch: [{0}][{1}/{2}]\t'
              'Time {batch_time.val:.3f} ({batch_time.avg:.3f})\t'
              'Data {data_time.val:.3f} ({data_time.avg:.3f})\t'
              'Loss {loss.val:.4f} ({loss.avg:.4f})\t'
              'Acc {acc.val:.3f} ({acc.avg:.3f})'.format(
            epoch,
            i + 1,
            len(data_loader),
            batch_time=batch_time,
            data_time=data_time,
            loss=losses,
            acc=accuracies))
    epoch_logger.log({
        'epoch': epoch,
        'loss': losses.avg,
        'acc': accuracies.avg,
        'lr': optimizer.param_groups[0]['lr']
    })

    # if epoch % opt.epoch_every_save_model == 0:
    #     save_file_path = os.path.join(opt.checkpoints,
    #                                   'save_{}.pth'.format(epoch))
    #     states = {
    #         'epoch': epoch + 1,
    #         'state_dict': model.state_dict(),
    #         'optimizer': optimizer.state_dict(),
    #     }
    #     torch.save(states, save_file_path)