MMEdu - No module named 'mmcv._ext'

问题遇到的现象和发生背景

我是一个中学生，当时我在上关于MMEdu的课，但是我编好代码后，却报错了。

用代码块功能插入代码，请勿粘贴截图

from MMEdu import MMClassification as cls
import os
with open("pid.pkl","w")as f:
    f.write(str(os.getpid()))
def generated_train():
    model = cls(backbone='LeNet')
    model.num_classes = 3
    model.load_dataset(path='D:/xedu/XEdu/dataset/cls/hand_gray')
    model.save_fold = 'D:/xedu/XEdu/save'
    model.train(epochs=5,validate=True,device='cpu',optimizer="SGD",lr=0.001,weight_decay=0.001,checkpoint=None,random_seed=1)
    if __name__ == '__main__':
        generated_train()

运行结果及报错内容

D:\Program Files\Python38\lib\site-packages\mmcv\cnn\bricks\transformer.py:33: UserWarning: Fail to import ``MultiScaleDeformableAttention`` from ``mmcv.ops.multi_scale_deform_attn``, You should install ``mmcv-full`` if you need this module.
  warnings.warn('Fail to import ``MultiScaleDeformableAttention`` from '
Traceback (most recent call last):
  File "C:\Users\FIX\Desktop\PythonApplication1\PythonApplication1.py", line 1, in 
    from MMEdu import MMClassification as cls
  File "D:\Program Files\Python38\lib\site-packages\MMEdu\__init__.py", line 3, in 
    from .Detection import MMDetection
  File "D:\Program Files\Python38\lib\site-packages\MMEdu\Detection\__init__.py", line 1, in 
    from .Detection_Edu import MMDetection
  File "D:\Program Files\Python38\lib\site-packages\MMEdu\Detection\Detection_Edu.py", line 6, in 
    from mmdet.apis import inference_detector, init_detector, show_result_pyplot, train_detector
  File "D:\Program Files\Python38\lib\site-packages\mmdet\apis\__init__.py", line 2, in 
    from .inference import (async_inference_detector, inference_detector,
  File "D:\Program Files\Python38\lib\site-packages\mmdet\apis\inference.py", line 7, in 
    from mmcv.ops import RoIPool
  File "D:\Program Files\Python38\lib\site-packages\mmcv\ops\__init__.py", line 2, in 
    from .active_rotated_filter import active_rotated_filter
  File "D:\Program Files\Python38\lib\site-packages\mmcv\ops\active_rotated_filter.py", line 8, in 
    ext_module = ext_loader.load_ext(
  File "D:\Program Files\Python38\lib\site-packages\mmcv\utils\ext_loader.py", line 13, in load_ext
    ext = importlib.import_module('mmcv.' + name)
  File "D:\Program Files\Python38\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
ModuleNotFoundError: No module named 'mmcv._ext'

我的解答思路和尝试过的方法

我尝试过更改mmcv安装方式，但在MMEdu安装时，就直接绑定了mmcv-full，无法更改，此办法不可行

我想要达到的结果

代码正常运行，不报错

• 关于该问题，我找了一篇非常好的博客，你可以看看是否有帮助，链接：No module named ‘mmcv._ext‘

报错是没有这个模块，安装一下就好了，打开命令行终端：

pip install mmcv-full==1.4.2-f https://download.openmmlab.com/mmcv/dist/cu101/torch1.7.0/index.html