pycharm 導入自定義模塊顯示紅色下划線提示：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 c

import 不能識別自定義包名，該類或者包沒有灌入python引入庫中

 解決方案：右擊pycharm中項目名-->Mark Directory as -->Resource root，然后重新打開項目紅線就消失了

意思：自定義的資源加入到該項目中，這樣才能被 import 識別