# workflow is typically set as: workflow = [('train', 1)]
# here the training begins.
runner.run(data_loaders, cfg.workflow)
Let’s take EpochBasedRunner for example and go a little bit into details about setting workflow:
让我们以 EpochBasedRunner 为例，详细介绍一下设置工作流程：
Say we only want to put train in the workflow, then we can set: workflow = [(‘train’, 1)]. The runner will only execute train iteratively in this case.
假设我们只想将 train 放入工作流中，那么我们可以设置：workflow = [(‘train’, 1)]。在这种情况下，跑步者只会迭代地执行训练。
Say we want to put both train and val in the workflow, then we can set: workflow = [(‘train’, 3), (‘val’,1)]. The runner will first execute train for 3 epochs and then switch to val mode and execute val for 1 epoch. The workflow will be repeated until the current epoch hit the max_epochs.
假设我们要将 train 和 val 都放在工作流中，那么我们可以设置：workfl