Merge pull request !514 from liyong126/mindrecord_pk_sampler_lee

Merge pull request !498 from wangnan39/fix_bug_in_model_eval_and_model_predict

Merge pull request !456 from candanzg/not_equal_auto_cast

Merge pull request !467 from candanzg/bug_for_makedirs

Merge pull request !464 from candanzg/summary_event_notes

Merge pull request !509 from cathwong/ckw_dataset_py_ut2

Merge pull request !406 from Peilin/first-row-crc-check

Merge pull request !460 from xulei/filter_master

Merge pull request !404 from JunhanHu/python_sampler_for_cpp_dataset

addressed code review comments. added check in python layer to exclude directories and to raise an error if a pattern does not match any file

fixed clang format

fixed cppcheck

fixed cppcheck (used std::accumulate and std::copy_if). regenerated tfrecord file to contain correct header, it was a dummy header before

fixed cppcheck: added const reference for string parameter for lambdas, fixed clang format: whitespace adjustments

more clang whitespace fixes...

changed print to logger.info

Merge pull request !425 from yanghaitao/yht_textfiledatasetv2

Merge pull request !489 from yanghaoran/master

Merge pull request !472 from YuJianfeng/master

Merge pull request !497 from ms_yan/take_log

Merge pull request !500 from zhangbuxue/fix_attribute_mapping

Merge pull request !493 from zhangbuxue/support_python_func_print

Merge pull request !87 from gziyan/dev_alltoall

Merge pull request !403 from fary86/add_cell_name_to_error_message_for_nn_layer

Merge pull request !478 from fary86/fix_log_and_ir_issues

Merge pull request !491 from lupengcheng/revert-merge-263-master

Merge pull request !470 from JoyLvliang/pynative-support-reducemean

Merge pull request !459 from liubuyu/master

Merge pull request !419 from candanzg/tensor_assign_bool_index

Merge pull request !469 from yangjie159/add-comment-of-export-lite-model

Merge pull request !453 from 万万没想到/I1CEDO

Merge pull request !261 from wenkai/histogram_dev3cp