Merge pull request !2314 from imaaamin/object_ops_pr

Merge pull request !2253 from nhussain/concat_op

Merge pull request !2317 from ZiruiWu/vocab_rework

remove graphengine changes

concat op

Truncate Pair

concat_op

remove graph engine changes

Merge pull request !2274 from xunxue/padend

Merge pull request !2316 from JunhanHu/alter_node_cpp

phase II vocab rework

added more test cases

fix api doc string

address review cmts and fix CI

address ci complains

fix review cmts

ci

Merge pull request !2258 from ZiruiWu/fix_api_doc

addr review cmts

revert

ci

private class

ci

fix ci

address ci

address review cmts

fix style err

Merge pull request !2244 from kouzhenzhong/minddataset_get_args

Merge pull request !2202 from yuchaojie/transformer

Merge pull request !2290 from yanzhenxiang2020/aicpu_param_open

Merge pull request !2273 from lichen/fix_embeding_look_up

Merge pull request !2211 from h.farahat/pair_truncate

Merge pull request !2281 from zyli2020/add_sigmoid

Merge pull request !2279 from zyli2020/add_model_script_of_wide_deep_for_gpu

Merge pull request !2221 from yao_yf/model_zoo_wide_deep_modify

Merge pull request !2185 from kouzhenzhong/wide_deep_dataset_graph

Merge pull request !2266 from luoyang/update

Merge pull request !1993 from luoyang/pylint

Merge pull request !2239 from liyong126/csv_to_mindrecord

Merge pull request !2275 from Xiaoda/4-fix-the-embeddinglookup-errors

Merge pull request !2296 from yangjie159/fix-export-lite-model-for-gpu

Merge pull request !2292 from limingqi107/master

Merge pull request !2276 from fary86/fix_eliminate_get_ref

Merge pull request !2278 from changzherui/mod_comment

Merge pull request !2271 from yihuaijie/master

Merge pull request !2283 from yanghaitao/yht_fix_profiling_inline_node

Merge pull request !2270 from lianliguang/master

Merge pull request !2280 from chenjianping/host_reduce