连接方法到自定义QListView窗口小部件——PyQt5和postgreSQL

I have a simple Qt application which adds and lists records retrieved from a postgresql db in a QListView using custom widgets. I am having some difficulty setting up a pushbutton (bottom left corner of each list item instance) which will effectively use the record primary key (of the instance) to delete the record from the dbI have a simple Qt application which adds and l