最近使用Pychorm编写Python时，每次要引入自定义模块，就会报错，提示“Unresolved reference”
Unresolved reference 'LoginClass' more... (Ctrl+F1)
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.
百度试了很多方法，结果都没用，最后很简单用一步就解决了，大家都可以试试
右击被调用模块存在的文件夹，“MarkDictionary as”-->“Sources root”
再次查看，报错消失了。
