pycharm安裝庫出現Make sure that you use the correct version of 'pip' installed for your Python...

安裝ddt遇到的坑： 1.在cmd用pip install ddt 安裝ddt的時候報錯： Could not find a version that satisfies the requirement ddt (from versions: ) No matching distribution found for ddt 方法一：更新pip版本為最新版10.0.1，問題沒解決 方法二：這是因爲網

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