fit_genoreter 밸리데이션 https://m.blog.naver.com/jeonghj66/221762791471
데이터프레임 컬럼간 상관 보기 https://blog.naver.com/PostView.nhn?blogId=kiddwannabe&logNo=221205309816&parentCategoryNo=&categoryNo=38&viewDate=&isShowPopularPosts=true&from=search
isin 반대 https://www.python2.net/questions-905886.htm
