pip安装报错 WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None))

(unet) C:\Users\12031>pip install netCDF4 scikit-image matplotlib lpips einops timm
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError(0, 'Error'))': /simple/netcdf4/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError(0, 'Error'))': /simple/netcdf4/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError(0, 'Error'))': /simple/netcdf4/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError(0, 'Error'))': /simple/netcdf4/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', OSError(0, 'Error'))': /simple/netcdf4/
ERROR: Could not find a version that satisfies the requirement netCDF4 (from versions: none)
ERROR: No matching distribution found for netCDF4

解决一：换源

pip install  scikit-image matplotlib lpips einops timm --index-url https://mirrors.aliyun.com/pypi
/simple/

解决2：使用原始源

pip install  scikit-image matplotlib lpips einops timm --index-url  https://pypi.org/simple

解决3：加入trust

pip install netCDF4 scikit-image matplotlib lpips einops timm -i  https://mirrors.aliyun.com/pypi/simple/ --trusted-host pypi.aliyun.com

解决4：改变pipy版本

python -m pip install pip==20.2 --index-url https://pypi.org/simple

最终方法：大概率就是自己网络的问题
1.换一个WiFi尝试一下
2.是否自己挂的有梯子，取消再试试