pip使用国内镜像仍然无法下载

问题遇到的现象和发生背景

C:\Users\张振邦>pip install -i https://pypi.tuna.tsinghua.edu.cn/simple scikit-fuzzy
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000001F4FFA6A4A0>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。'))': /simple/scikit-fuzzy/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000001F4FFA6A800>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。'))': /simple/scikit-fuzzy/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000001F4FFA6A860>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。'))': /simple/scikit-fuzzy/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000001F4FFA6A3B0>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。'))': /simple/scikit-fuzzy/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000001F4FFA6B2E0>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。'))': /simple/scikit-fuzzy/
ERROR: Could not find a version that satisfies the requirement scikit-fuzzy (from versions: none)
ERROR: No matching distribution found for scikit-fuzzy

问题相关代码，请勿粘贴截图

问题如上

运行结果及报错内容

我尝试了很久很久了。

我的解答思路和尝试过的方法

我想要达到的结果

我希望知道是怎么回事，以及如何解决。

pip install -U scikit-fuzzy

https://pythonhosted.org/scikit-fuzzy/install.html

不行换个源，也可能跟代理有关

https://blog.csdn.net/mzl_18353516147/article/details/89552667

可能是Let’s Encrypt 根证书过期，导致pip使用清华镜像不信任？你可以尝试其他的镜像源，比如阿里云或者中科大的？

pip install torch==1.4.0 -i https://mirrors.aliyun.com/pypi/simple/
pip install torch==1.4.0 -i https://mirrors.ustc.edu.cn/pypi/simple/

先试试这个网站能不能打开，能打开的话可以直接下载到本地安装
https://pypi.tuna.tsinghua.edu.cn/simple/scikit-fuzzy/
个人一般是用阿里的源，感觉比清华的稳定点（可能因为个人网络原因
https://mirrors.aliyun.com/pypi/simple/