pytorch

0e8d4836 - add feature name into module and update position weighted to match dper2

add feature name into module and update position weighted to match dper2 Test Plan: The notebook showed no diff for id score list https://our.intern.facebook.com/intern/anp/view/?id=154764 Reviewed By: alyssawangqq Differential Revision: D17649974 fbshipit-source-id: 84cb4ae372fc215295c2d0b139d65f4eacafae4a