我正在尝试学习 PyTorch 并使用自定义数据集。代码信用 - https://github.com/vineeth2309/Custom-Dataset-and-Dataloader-in-Torch。
但是,当我运行代码时,我得到一个“KeyError”。
import glob
import cv2
import numpy as np
import torch
from torch.utils.data import Dataset, DataLoader
class CustomDataset(Dataset):
def __init__(self):
self.imgs_path = "Dog_Cat_Dataset/"
file_list = glob.glob(self.imgs_path + "*")
print(file_list)
self.data = []
for class_path in file_list:
class_name = class_path.split("/")[-1]
for img_path in glob.glob(class_path + "/*.jpeg"):
self.data.append([img_path, class_name])
print(self.data)
self.class_map = {"dogs" : 0, "cats": 1}
self.img_dim = (416, 416)
def __len__(self):
return len(self.data)
def __getitem__(self, idx):
img_path, class_name = self.data[idx]
img = cv2.imread(img_path)
img = cv2.resize(img, self.img_dim)
class_id = self.class_map[class_name]
img_tensor = torch.from_numpy(img)
img_tensor = img_tensor.permute(2, 0, 1)
class_id = torch.tensor([class_id])
return img_tensor, class_id
if __name__ == "__main__":
dataset = CustomDataset()
print (dataset)
data_loader = DataLoader(dataset, batch_size=4, shuffle=True)
print (data_loader)
for imgs, labels in data_loader:
print("Batch of images has shape: ",imgs.shape)
print("Batch of labels has shape: ", labels.shape)
堆栈跟踪 :
C:\Users\parag\anaconda3\envs\tf-gpu\python.exe C:/Users/parag/PycharmProjects/Custom-Dataset-and-Dataloader-in-Torch/Main.py
['Dog_Cat_Dataset\\cats', 'Dog_Cat_Dataset\\dogs']
[['Dog_Cat_Dataset\\cats\\1.jpeg', 'Dog_Cat_Dataset\\cats'], ['Dog_Cat_Dataset\\cats\\2.jpeg', 'Dog_Cat_Dataset\\cats'], ['Dog_Cat_Dataset\\cats\\3.jpeg', 'Dog_Cat_Dataset\\cats'], ['Dog_Cat_Dataset\\cats\\4.jpeg', 'Dog_Cat_Dataset\\cats'], ['Dog_Cat_Dataset\\cats\\5.jpeg', 'Dog_Cat_Dataset\\cats'], ['Dog_Cat_Dataset\\dogs\\1.jpeg', 'Dog_Cat_Dataset\\dogs'], ['Dog_Cat_Dataset\\dogs\\2.jpeg', 'Dog_Cat_Dataset\\dogs'], ['Dog_Cat_Dataset\\dogs\\3.jpeg', 'Dog_Cat_Dataset\\dogs'], ['Dog_Cat_Dataset\\dogs\\4.jpeg', 'Dog_Cat_Dataset\\dogs'], ['Dog_Cat_Dataset\\dogs\\5.jpeg', 'Dog_Cat_Dataset\\dogs']]
<__main__.CustomDataset object at 0x00000254C0568FD0>
<torch.utils.data.dataloader.DataLoader object at 0x00000254C250A7F0>
Traceback (most recent call last):
File "C:\Users\parag\PycharmProjects\Custom-Dataset-and-Dataloader-in-Torch\Main.py", line 40, in <module>
for imgs, labels in data_loader.dataset:
File "C:\Users\parag\PycharmProjects\Custom-Dataset-and-Dataloader-in-Torch\Main.py", line 29, in __getitem__
class_id = self.class_map[class_name]
KeyError: 'Dog_Cat_Dataset\\cats'
Process finished with exit code 1
[我的文件夹结构][1]
我已经尝试过,但无法解决错误。有人可以帮我吗?[1]:https ://i.stack.imgur.com/1giJw.png