1) A[B]=U
2) A[A>n]=U
    A.shape == B.shape
    U is a scalar or Tensor(size==1)
    B is Tensor(dtype=bool)
    n is a Number

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

Merge pull request !383 from zhaozhenlong/cell/psnr

Merge pull request !286 from wangqiuliang/resolve-pynative-operator-issue

Merge pull request !183 from JunhanHu/cpp_sampler

Merge pull request !386 from changzherui/modify-ut

Merge pull request !343 from amongo/FixGradUsingInterfaceExtend

Merge pull request !217 from zhangbuxue/support_pow_operator

Merge pull request !379 from JichenZhao/groupnorm

add test case for grad concat

fix usage in test framework

fix testcase

format code

Merge pull request !304 from Xiaoda/modify-not-fully-use-devices-and-strategy-checking

Merge pull request !243 from h.farahat/nested_repeat

Merge pull request !294 from zhaozhenlong/cell/ssim

Merge pull request !312 from xiefangqi/xfq_apply_branch

Merge pull request !273 from liyong126/mindrecord_subset_sampler_python

Merge pull request !250 from casgj/gaojing_new4

Merge pull request !239 from fanglei/master

adjust internal api

Merge pull request !245 from chentingting/add_bool_type_check_in_comm_op

Merge pull request !258 from lichen/add_minimum_distributed_op

Merge pull request !215 from penn/fix_print_bprop_error

Merge pull request !167 from lichen/add_squeeze_distributed_op

Merge pull request !220 from yangzhenzhang/dropoutdomask

Merge pull request !169 from xychow/fix-manager-children-issue