Merge pull request !2662 from Kang/opt

Merge pull request !2634 from LiHongzhang/no_step_zero

Merge pull request !248 from peixu_ren/custom_aicpu

Merge pull request !2454 from yanghaoran/master

Merge pull request !2681 from limingqi107/master

Merge pull request !2684 from VectorSL/mul

Merge pull request !2674 from zhangbuxue/add_typeid_to_type_conversion_scene

Merge pull request !2687 from Chong/zc

Merge pull request !2664 from liyong126/mindrecord_model_zoo

Merge pull request !2641 from JoyLvliang/fix-grad-value-is-wrong-in-pynative-hook

Merge pull request !2464 from luoyang/pylint

Merge pull request !2668 from wangnan39/support_weight_decay_for_sparse_optimizer

Merge pull request !2623 from lirongzhen1/para_sparse

Merge pull request !2654 from guozhijian/fix_tfrecord_to_mr_para_check

Merge pull request !2477 from ddwolf/add_desc_for_graph_kernel

Merge pull request !2644 from yanghaoran/upgrade_ascend_0628

Merge pull request !2614 from jinyaohui/print

Merge pull request !2659 from chenjianping/host_reduce

Merge pull request !2629 from yanghaitao/yht_sampling_interval

Merge pull request !2660 from laiyongqiang/gpu_opt

Merge pull request !2563 from kisnwang/reorder-depend-for-mix-target

Merge pull request !2580 from qianlong21st/fix_basic_tokenizer

Merge pull request !2640 from liyong126/minddataset_fix_errmsg

Merge pull request !2631 from amongo/FixExpandDimsOps

Merge pull request !247 from zhaozhenlong/fix-issue-ssim-limit-input-dtype-incu

Merge pull request !2651 from Margaret_wangrui/copy_ref_map_to_final_graph_in_RecurseCompileGraph

Merge pull request !2625 from Margaret_wangrui/review_code_second

Merge pull request !2635 from zhaozhenlong/fix-issue-ssim-limit-input-dtype