Merge pull request !672 from AdelShafiei/ua_ut

Merge pull request !862 from gengdongjie/master

Merge pull request !867 from meixiaowei/master

Merge pull request !865 from 章一智/master

Merge pull request !832 from JichenZhao/syncbn

Merge pull request !794 from zhaozhenlong/fix-issues-image-gradients-complement-check

Merge pull request !861 from 梅晓蔚/master

Merge pull request !830 from Jamie/operator_print

2. add relative path support in resnet50 example
3. optimize allreuce split strategy

Merge pull request !856 from jiangzhiwen/dataset/skip_thread

fix DiagPart constant folding issue

fix argmin output type check

fix atan2 doc error

fix remove FusedBatchNorm and its grad

Merge pull request !835 from lihongkang/master

Merge pull request !858 from xiefangqi/md_fix_gpu_issue

Merge pull request !844 from chujinjin/add_accuracy_for_resnet_cifar

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

update mindspore/ops/operations/other_ops.py.

Merge pull request !852 from lianliguang/master

Merge pull request !839 from wangnan39/add_parameter_verification_for_rmsprop

Merge pull request !833 from wandongdong/master

Merge pull request !841 from zhangbuxue/adapt_ExtractImagePatches_and_fix_EluGrad

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

Merge pull request !845 from fary86/add_error_type_index_error

!848 sampler and num_shards is not supported if source does not have attribute '__getitem__ in GeneratorDataset
Merge pull request !848 from yanghaitao/yht_generator_sampler_numshards

Merge pull request !721 from candanzg/tensor_assgin_ellipsis

Merge pull request !727 from Chong/cost

Merge pull request !846 from 梅晓蔚/master