Merge pull request !2266 from luoyang/update

Merge pull request !1993 from luoyang/pylint

Merge pull request !2239 from liyong126/csv_to_mindrecord

Merge pull request !2275 from Xiaoda/4-fix-the-embeddinglookup-errors

Merge pull request !2296 from yangjie159/fix-export-lite-model-for-gpu

Merge pull request !2292 from limingqi107/master

Merge pull request !2276 from fary86/fix_eliminate_get_ref

Merge pull request !2278 from changzherui/mod_comment

Merge pull request !2271 from yihuaijie/master

Merge pull request !2283 from yanghaitao/yht_fix_profiling_inline_node

Merge pull request !2270 from lianliguang/master

Merge pull request !2280 from chenjianping/host_reduce

Merge pull request !2246 from kisnwang/fix-cpu-argmax

Merge pull request !2194 from 王东旭/master

Merge pull request !2252 from ms_yan/config_load

Merge pull request !2197 from zhaoting/ResNet50_st

Merge pull request !2116 from ghzl/change-multitypefungraph-to-internal-interface

Merge pull request !2220 from leopz/fix_dump

Merge pull request !2267 from heleiwang/fix_doc

Merge pull request !2265 from dengwentao/code_check

Merge pull request !2251 from YuJianfeng/proximal

Merge pull request !2222 from wangcong/master

Merge pull request !2150 from chenweifeng/tanh-fp16

Merge pull request !2236 from 李鸿章/callback

Merge pull request !2262 from yanghaitao/yht_fasterrcn

Merge pull request !2250 from guozhijian/fix_db_close_fail

Merge pull request !2148 from wangqiuliang/fix-hook-bprop-issue

Merge pull request !2199 from Simson/push-to-opensource

Merge pull request !2179 from YuJianfeng/all_reduce_index

Merge pull request !2193 from wenkai/wk1_log_level_0617

Merge pull request !2237 from wandongdong/master