点击小灯泡提示出现以下内容：This inspection detects names that should resolve but don't. Due to dynamic dispatch and duck typing, this is possible in a limited but useful number of cases. Top-level and class-level items are supported better than instance items.
上面大致意思：
import 不能识别自定义包名，该类或者包没有灌入python引入库中
解决方法：
File下有invalidate caches/restart选项，点击即可
如果不行使用
解决方案：右击pycharm中项目名-->Mark Directory as -->Resource root