Merge pull request !856 from jiangzhiwen/dataset/skip_thread

Merge pull request !844 from chujinjin/add_accuracy_for_resnet_cifar

Merge pull request !829 from ghzl/parser-parameter-in-tuple-in-run_op

Merge pull request !839 from wangnan39/add_parameter_verification_for_rmsprop

Merge pull request !841 from zhangbuxue/adapt_ExtractImagePatches_and_fix_EluGrad

Merge pull request !823 from huanghui/BatchNormGrad-split-pass

Merge pull request !721 from candanzg/tensor_assgin_ellipsis

Merge pull request !749 from wenkai/wkmaster

Merge pull request !730 from yuanhan/master

Signed-off-by: candanzg <zhangshucheng@huawei.com>

Merge pull request !816 from flywind/combine_opt

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