WARNING:root:DataLoader reader thread raised an exception

WARNING:root:DataLoader reader thread raised an exception.
Exception in thread Thread-7:
Traceback (most recent call last):
File "C:\Python38\lib\threading.py", line 932, in _bootstrap_inner
self.run()
File "C:\Python38\lib\threading.py", line 870, in run
Traceback (most recent call last):
File "E:/userProject/src/零基础实践深度学习/paddlepaddle/第四章：目标检测YOLOv3（下）/yolov3/main.py", line 37, in 
self._target(*self._args, **self._kwargs)
File "C:\Python38\lib\site-packages\paddle\fluid\dataloader\dataloader_iter.py", line 192, in _thread_loop
img, gt_boxes, gt_labels, im_shape = next(train_loader())
File "C:\Python38\lib\site-packages\paddle\fluid\dataloader\dataloader_iter.py", line 197, in __next__
six.reraise(*sys.exc_info())
File "C:\Python38\lib\site-packages\six.py", line 719, in reraise
data = self._reader.read_next_var_list()
SystemError: (Fatal) Blocking queue is killed because the data reader raises an exception.
[Hint: Expected killed_ != true, but received killed_:1 == true:1.] (at C:\home\workspace\Paddle_release3\paddle/fluid/operators/reader/blocking_queue.h:166)

raise value
File "C:\Python38\lib\site-packages\paddle\fluid\dataloader\dataloader_iter.py", line 160, in _thread_loop

进程已结束，退出代码为 1

第四章：目标检测YOLOv3（下）的代码就错误了