填坑记录1--pip安装包--Read timed out

错误显示如下：

raise ReadTimeoutError(self._pool, None, 'Read timed out.')
pip._vendor.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Read timed out.

解决办法：

使用镜像：pip install xxxx -i https://pypi.douban.com/simple  如下：

pip install virtualenv -i https://pypi.douban.com/simple