修改为清华大学的镜像源，并置为可信（阿里云的好像有点问题但不知到出在哪里）

pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple  --trusted-host pypi.tuna.tsinghua.edu.cn

PS D:\Python_project\Cycle-Gan> pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple  --trusted-host pypi.tuna.tsinghua.edu.cn 
Writing to C:\Users\love_me\AppData\Roaming\pip\pip.ini

#下面这行代码是查看镜像源修了没
PS D:\Python_project\Cycle-Gan> pip -v config list

For variant 'global', will try loading 'C:\ProgramData\pip\pip.ini'
For variant 'user', will try loading 'C:\Users\love_me\pip\pip.ini'
For variant 'user', will try loading 'C:\Users\love_me\AppData\Roaming\pip\pip.ini'
For variant 'site', will try loading 'D:\environments\python310\pip.ini'
global.index-url='https://pypi.tuna.tsinghua.edu.cn/simple'

PS D:\Python_project\Cycle-Gan>

命令在“终端”窗口输入

求求路过的老爷给个免费的赞，如果有帮助的话