使用pycharm调用模块后字体变灰 是什么原因呢？

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.

望解答~谢谢！

file下有invalidate caches/restart选项，点击即可

http://jingyan.baidu.com/article/f71d6037a8ac141ab641d115.html

import 之后要使用才会变亮