Merge pull request !2360 from pengyanjun/fix_dataset_public_api_build_vocab

Merge pull request !2325 from imaaamin/object_ops_pr2

Merge pull request !2371 from nhussain/missing_concat_test

Merge pull request !2359 from yihuaijie/master

Merge pull request !2354 from ms_yan/GetRow_fail

Merge pull request !2348 from liuxiao/central_crop

Merge pull request !2352 from wangnan39/fix_error_about_data_loop_size

Merge pull request !1897 from jinyaohui/print

Merge pull request !2351 from liuwenhao/master

Merge pull request !2323 from Chong/interface

Merge pull request !2349 from panfengfeng/fix_gpu_invalid_input_data

Merge pull request !2346 from wangcong/master

Merge pull request !2264 from liuxiao/Adapt-ApplyProximalAdagrad-operator-for-vm

Merge pull request !2328 from jiangjinsheng/issue_fix4

Merge pull request !2284 from BowenK/fix_depend

Merge pull request !2335 from chengxb7532/cxb_st

Merge pull request !1990 from caifubi/fix-profiling-stream-id

Merge pull request !2064 from caifubi/add-memory-context-var

Merge pull request !2315 from yanzhenxiang2020/add_pack_open

Merge pull request !2268 from yanzhenxiang2020/open_ScatterMax_bprop

Merge pull request !2342 from rick_sanchez/test

Merge pull request !2331 from Simson/push-to-opensource

Merge pull request !2307 from baihuawei/cpulstm

Merge pull request !2339 from zhangbuxue/support_catch_index_error_in_c++

Merge pull request !1935 from 李鸿章/policy_writer

Merge pull request !2332 from huanghui/fix-ConfusionSoftmaxGrad-fusion-pass