MindSpore报错"TypeError: parse() missing 1 required positional."
1 报错描述
1.1 系统环境
ardware Environment(Ascend/GPU/CPU): CPU
Software Environment:
– MindSpore version (source or binary): 1.6.0
– Python version (e.g., Python 3.7.5): 3.7.6
– OS platform and distribution (e.g., Linux Ubuntu 16.04): Ubuntu 4.15.0-74-generic
– GCC/Compiler version (if compiled from source):
1.2 基本信息
1.2.1脚本
此案例使用mindspore.dataset自定义数据集:
import os
import numpy as np
from PIL import Image
import mindspore.common.dtype as mstype
import mindspore.dataset as ds
import mindspore.dataset.transforms.c_transforms as C
import mindspore.dataset.vision.c_transforms as vc
class _dcp_Dataset:
def __init__(self,img_root_dir,device_target="CPU"):
if not os.path.exists(img_root_dir):
raise RuntimeError(f"the input image dir {img_root_dir} is invalid")
self.img_root_dir=img_root_dir
self.img_names=[i for i in os.listdir(img_root_dir) if i.endswith(".jpg")]
self.target=device_target
def __len__(self):
return len(self.img_names)
def __getitem__(self, index):
img_name=self.img_names[index]
im=Image.open(os.path.join(self.img_root_dir,img_name))
image=np.array(im)
label_str=img_name.split("_")[-1]
label_str=label_str.split(".")[0]
label=np.array(label_str)
return image,label
def creat_dataset(dataset_path,batch_size=2,num_shards=1,shard_id=0,device_target="CPU"):
dataset=_dcp_Dataset(dataset_path,device_target)
data_set=ds.GeneratorDataset(dataset,["image","label"],shuffle=True,num_shards=1,shard_id=0)
image_trans=[
vc.Resize((224,224)),
vc.RandomHorizontalFlip(),
vc.Rescale(1/255,shift=0),
vc.Normalize((0.4465, 0.4822, 0.4914), (0.2010, 0.1994, 0.2023)),
vc.HWC2CHW
]
label_trans=[C.TypeCast(mstype.int32)]
data_set=data_set.map(operations=image_trans,input_columns=["image"])
data_set=data_set.map(operations=label_trans,input_columns=["label"])
# data_set=data_set.shuffle(buffer_size=batch_size)
data_set=data_set.batch(batch_size=batch_size,drop_remainder=True)
# data_set=data_set.repeat(1)
return data_set
if __name__ == '__main__':
data=creat_dataset("./image_DCP")
print(data)
data_loader = data.create_dict_iterator()
for i, data in enumerate(data_loader):
print(i)
print(data)
1.2.2报错
报错信息:
2 原因分析以及解决办法
此处缺少(),将此处代码改为 vc.HWC2CHW() 可正常执行。
3 总结
定位问题的步骤
例如:有 xxDataset -> map -> map -> batch 这样的数据处理流程。
可以按如下方式调试脚本:
- 只保留 xxDataset,然后运行下脚本,查看是否报错;
- 保留 xxDataset -> map,然后运行下脚本,查看是否报错;
- 保留 xxDataset -> map -> map,然后运行下脚本,查看是否报错;
- 保留 xxDataset -> map -> map -> batch,然后运行下脚本,查看是否报错;
按照上述的方法,可定位到是哪个map/batch出错了。