部分包超时，更换下载源
pip install -i https://pypi.douban.com/simple notebook
Bekey
Bekey
部分包超时，更换下载源
pip install -i https://pypi.douban.com/simple notebook
pip install notebook 安装 HTTPSConnectionPool(host='files.pythonhosted.org', port=443):
https://blog.coolsre.com/archives/pip-install-notebook-an-zhuang-httpsconnectionpool-host-files.pythonhosted.org-port-443
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