pytorch各函数

感谢以下作者
在这里做一下整理以免忘记

scatter：
https://blog.youkuaiyun.com/guofei_fly/article/details/104308528?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522159447220819724835827964%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=159447220819724835827964&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2_allfirst_rank_ecpm_v3~pc_rank_v2-4-104308528.first_rank_ecpm_v3_pc_rank_v2&utm_term=scatter%E5%87%BD%E6%95%B0%E8%AF%A6%E8%A7%A3