WARNING: There was an error checking the latest version of pip.

• 警告：检查最新版本的pip时出错 忽略无效的分发 -ip

VPN网络的提示对我非常有帮助。模块安装失败，出现上述警告，并重试连接断开警告：

WARNING: There was an error checking the latest version of pip.
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/dynesty/
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更新pip也不起作用

• 更新pip操作一

python -m pip install --upgrade pip
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• 更新pip操作二

pip install --upgrade pip
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更新pip也不起作用，但是当我断开VPN网络时一切都很好。