Merge pull request !1312 from jiangjinsheng/vm_erfc

Merge pull request !1304 from amongo/AddCheckForControlDepend

Merge pull request !1266 from huanghui/LambNextMvWithDecayRuleConds-fusion-pass

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

Merge pull request !1125 from jiangjinsheng/space_to_depth

Merge pull request !1269 from wenchunjiang/fix_task_sink_bug

Merge pull request !1189 from leopz/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 !1231 from zhoufeng/label-assign

Merge pull request !1228 from liuxiao/UnsortedSegmentMin

Merge pull request !1224 from JichenZhao/squaresumall

Signed-off-by: zhoufeng <zhoufeng54@huawei.com>

Merge pull request !1209 from liubuyu/master

Merge pull request !1218 from jinyaohui/pylint1

Merge pull request !1187 from yangzhenzhang/ckpt-and-restore-parameter-shape

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

Merge pull request !1100 from jinyaohui/context_opt_2