Merge pull request !1317 from liyong126/mindrecord_compress

Merge pull request !1133 from zhangbuxue/support_tensor_get_value_by_tensor_index

Merge pull request !1245 from wangnan39/add_model_init_api_to_compile_df_graph_before_train_and_eval

Merge pull request !1281 from Peilin/splitOp

Merge pull request !1342 from Tinazhang/cc

Merge pull request !1229 from yihuaijie/master

implementation 99% complete

everything and tested except for repeatable shuffling

tested most basic/typical split usecases

cleanup

some more cleanup

fix CI

more ci fix

more ci fixes

more ci fix

more ci fix

more ci fix

added more tests, fixed some bugs

some more clean up and test cases

added shard/shuffle before split warning/error

addressed code review comments and ci

fixed ci

Merge pull request !1307 from cathwong/ckw_dataset_ut_unskip2

support tensor set value by tensor index

Merge pull request !1302 from lihongkang/master

Merge pull request !1312 from jiangjinsheng/vm_erfc

Merge pull request !1304 from amongo/AddCheckForControlDepend

Merge pull request !1272 from JunhanHu/minddata_opt

Merge pull request !1250 from amongo/SupportDictSetItemTransform

Merge pull request !1282 from jiangjinsheng/vm_prelu

Merge pull request !1263 from Kang/master

format code

remove save_graph

raise exception when dictionary setitem if the key not exists

resolve error

remove unnessary op_

Merge pull request !1111 from jiangjinsheng/vm_pack

Merge pull request !1228 from liuxiao/UnsortedSegmentMin

Merge pull request !1218 from jinyaohui/pylint1

Merge pull request !1192 from h.farahat/string_Tensor

Merge pull request !1129 from zhaozhenlong/op/bounding-box-encoder

Merge pull request !1203 from changzherui/code516

Merge pull request !1176 from jiangjinsheng/issue_transpose

Merge pull request !1195 from jiangjinsheng/issue_geswitch