Merge pull request !2708 from guozhijian/enhance_api_comment_del_dead_code

Merge pull request !2717 from ms_yan/check_param

Merge pull request !2716 from qianlong21st/fix_python_api

Merge pull request !2713 from jinyaohui/master

Merge pull request !2703 from chenfei_mindspore/parameter-should-not-act-as-the-second-input-of-control-depend-when-depend-mode-is-0

Merge pull request !2692 from panbingao/master

if parameter is the second input of control depend and depend mode is 0,this control relation is invalid

Merge pull request !2696 from zyli2020/bug_fix

Merge pull request !2661 from zhaozhenlong/op/scatter-add

Merge pull request !2680 from YuJianfeng/ut

Merge pull request !2690 from zhangbuxue/add_typeid_to_type_conversion_scene

Merge pull request !2658 from baihuawei/reduce

Merge pull request !2675 from hexia/deal-logical-and

Merge pull request !2504 from Destiny/master-mod-review

Merge pull request !2676 from linqingke/mass

Merge pull request !2667 from Kang/optimization

Merge pull request !2639 from Kang/master

Merge pull request !2583 from gengdongjie/master

Merge pull request !2669 from TronZhang/akg_default

Merge pull request !2662 from Kang/opt

Merge pull request !2634 from LiHongzhang/no_step_zero

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