Merge pull request !1218 from jinyaohui/pylint1

Merge pull request !1183 from candanzg/implicit_type_conversion

Merge pull request !1221 from jiangjinsheng/bn_training_update_v2

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

Merge pull request !1219 from YuJianfeng/master

Merge pull request !863 from zjun/fix_codedex

Merge pull request !1207 from jinyaohui/add_context

Merge pull request !1217 from zhangbuxue/add_attr_for_conv2d_bprop_input

Merge pull request !1202 from zjun/fix_tensor_print

Merge pull request !1213 from Margaret_wangrui/create-new-parameter-from-parameter

Merge pull request !1204 from caifubi/support-hccl-multi-group

Merge pull request !1135 from kisnwang/add-group-for-allreduce-fusion

Merge pull request !1078 from huanghui/lars-v2-fission-pass

1.Support Broadcast op
2.Support communication op as graph output
3.Optimize Communication op memory alocation
4.support hccl multi-group

Merge pull request !1197 from jinyaohui/pylint1

Merge pull request !1188 from panyifeng/fine_tuning_mindspore_test_framework

Merge pull request !1170 from yangjie159/fix_memreuse_to_support_large_batchsize

Merge pull request !1192 from h.farahat/string_Tensor

Merge pull request !1186 from wenchunjiang/construct_kernel_graph

Merge pull request !972 from seatea/fix-cse-bug-for-random-effect

Merge pull request !1166 from wukesong/add-dy-lr

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

be optimized as it will generate different values each time.

Merge pull request !804 from huanghui/fix-confusionmulgrad-fusion-pass