問題：pyhton 3安裝module報錯ERROR: Could not find a version that satisfies the requirement config.paths
% pip install config.paths ERROR: Could not find a version that satisfies the requirement config.paths ERROR: No matching distribution found for config.paths
通過pip安裝時常常會出現ERROR: Could not find a version that satisfies the requirement xxx的問題，常用配置鏡像源來解決此問題。如下：
pip install 包名 -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
如配置鏡像源也解決不了，可以嘗試配置環境變量解決。