如果是在虚拟环境中请看我的博客：
https://blog.csdn.net/qq_38735017/article/details/124705329?csdn_share_tail=%7B%22type%22%3A%22blog%22%2C%22rType%22%3A%22article%22%2C%22rId%22%3A%22124705329%22%2C%22source%22%3A%22qq_38735017%22%7D&ctrtid=gsJNl
pip install -r C:UserswangDesktoppycharm作业yolov5-pytorch-mainyolov5-pytorch-mainrequirements.txt
pip install -r C:UserswangDesktoppycharm作业yolov5-pytorch-mainyolov5-pytorch-mainrequirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple/
