Merge pull request !795 from jinyaohui/clean_pylint_0428

Merge pull request !792 from wsc/lossscale_script

Merge pull request !799 from dinghao/dirty_flag

Merge pull request !732 from zhangbuxue/dock_AcoshGrad_AvgPool_AvgPoolGrad_for_vm

Merge pull request !728 from yao_yf/strategy_checkpoint_extend

Merge pull request !791 from 梅晓蔚/master

Merge pull request !751 from zjun/remove_enable_hccl

Merge pull request !746 from lirongzhen1/bp_reducescatter

Merge pull request !694 from rick_sanchez/master

Merge pull request !700 from penn/validate_bprop_rules

Merge pull request !603 from liyong126/update_pk_sampler

Merge pull request !747 from kisnwang/change-cpu-kernel-dir

Merge pull request !671 from EricZ/master

Merge pull request !466 from h.farahat/deepcopy

Merge pull request !711 from ZiruiWu/mindspore_master_only

Merge pull request !718 from zhouyuanshen/master

Merge pull request !663 from flywind/fix_bug

Merge pull request !736 from yanghaitao/yht_tftextfile_black_line

Merge pull request !698 from Xiaoda/support-wide-deep-in-auto-parallel

Merge pull request !657 from huanghui/fix-confusionmulgrad-fusion-pass

Merge pull request !687 from candanzg/summary_tag_check

Merge pull request !474 from wsc/lossscale_script

fix ut

Merge pull request !695 from YuJianfeng/master

Merge pull request !682 from liuxiao/fix-bug

Merge pull request !681 from zhaozhenlong/psnr-check-same-shape

Merge pull request !430 from Etone.Chan/bufferfusion