resnet50 val_while_train 报错

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Describe the bug/ 问题描述 (Mandatory / 必填) A clear and concise description of what the bug is.

在openi上使用train.py脚本在cifar10上训练resnet50的时候，启用--val_while_train True参数报错，报错提示没有val这个usage。

Hardware Environment(Ascend/GPU/CPU) / 硬件环境:

Please delete the backend not involved / 请删除不涉及的后端: /device ascend
Software Environment / 软件环境 (Mandatory / 必填): -- MindSpore version (e.g., 1.7.0.Bxxx) : 1.10.1 -- Python version (e.g., Python 3.7.5) : 3.7.10 -- OS platform and distribution (e.g., Linux Ubuntu 16.04): EulerOS 2.0 (SP8) -- GCC/Compiler version (if compiled from source):
Excute Mode / 执行模式 (Mandatory / 必填)(PyNative/Graph):

Please delete the mode not involved / 请删除不涉及的模式: /mode graph

To Reproduce / 重现步骤 (Mandatory / 必填) Steps to reproduce the behavior:

git clone https://github.com/mindspore-lab/mindcv.git
进入mindcv目录
pip install -e .
下载cifar10数据集到cifar-10-batches-bin
python train.py --model resnet50 --dataset cifar10 --data_dir ./cifar-10-batches-bin --batch_size 128 --val_while_train True
See error

Expected behavior / 预期结果 (Mandatory / 必填) A clear and concise description of what you expected to happen.

(MindSpore) [ma-user mindcv]$python train.py --model resnet50 --dataset cifar10 --data_dir ./cifar-10-batches-bin  --batch_size 128 --val_while_train True
Traceback (most recent call last):
  File "train.py", line 337, in <module>
    train(args)
  File "train.py", line 124, in train
    download=args.dataset_download,
  File "/home/ma-user/work/mindcv/mindcv/data/dataset_factory.py", line 152, in create_dataset
    **mindspore_kwargs,
  File "/home/ma-user/anaconda3/envs/MindSpore/lib/python3.7/site-packages/mindspore/dataset/engine/validators.py", line 351, in new_method
    check_valid_str(usage, ["train", "test", "all"], "usage")
  File "/home/ma-user/anaconda3/envs/MindSpore/lib/python3.7/site-packages/mindspore/dataset/core/validator_helpers.py", line 405, in check_valid_str
    raise ValueError("Input {0} is not within the valid set of {1}.".format(arg_name, str(valid_strings)))
ValueError: Input usage is not within the valid set of ['train', 'test', 'all'].

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mindspore-lab / mindcv

resnet50 val_while_train 报错 #723