PyCharm下解决Unresolved Reference问题

在开发过程，特别是clone项目时在PyCharm中经常出现Unresolved Reference问题，对于有强迫症的人来说，简直不可忍受。

1. 进入PyCharm->Preferences->Build,Excution,Deployment->Console->Python Console勾选上Add source roots to PYTHONPATH;
2. 进入PyCharm->Preferences->Project->Project Structure,通过选中某一目录右键添加sources;
3. 点击Apply和OK即可.