pip安装报错ERROR: Could not find a version that satisfies the requirement pycryptodome (from versions: n

使用pip install × 报错

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ReadTimeoutError("HTTPSConnectionPool(host='pypi.org', port=443): Read timed out. (read timeout=15)")': /simple/pycryptodome/
ERROR: Could not find a version that satisfies the requirement pycryptodome (from versions: none)
ERROR: No matching distribution found for pycryptodome

• 原因：python国内网络不稳定，导致报错。
• 解决办法：使用国内的安装源

命令：

pip install  ×  -i https://pypi.tuna.tsinghua.edu.cn/simple

• 清华大学

 https://pypi.tuna.tsinghua.edu.cn/simple

• 中国科技大学

https://pypi.mirrors.ustc.edu.cn/simple/

• 阿里云

http://mirrors.aliyun.com/pypi/simple/

• 豆瓣

 http://pypi.douban.com/simple/