Merge pull request !4872 from TinaMengtingZhang/cpp-api-tfrecord-dataset

Merge pull request !5648 from MahdiRahmaniHanzaki/get-col-name

Merge pull request !5671 from luoyang/c-api-pyfunc

fix to support schema=nullptr

Merge pull request !5387 from lixiachen/testcase_epoch

Merge pull request !5085 from lixiachen/cache_hostname

Merge pull request !5255 from heleiwang/fix_graphdata

Turn --stop into sync

Ignore the rc of shutdown

Merge pull request !4964 from anzhengqi/I1QWT0-memory-ascend

Merge pull request !4916 from heleiwang/gnn_fix_bug

2. fix test_graphdata_distributed.py failing randomly

Merge pull request !4314 from nhussain/clean_up_bindings

implment pause in MapOp, added more to callback

add ds_callback

- Initial drop of Python DSCallback

- Pybind DSCallback

- Pybind DSCallback

added callback to mapOp

- de_pipeline DSCallback

- de_pipeline DSCallback

add test case, segfault for now

fix seg fault

- de_pipeline DSCallback

remove 1 line

update callback test case, now works

use builder class for mapOp callback

- de_pipeline DSCallback

- de_pipeline DSCallback

- de_pipeline DSCallback

better test case

minor fix

add comments and minor clean ups

get rid of nullptr in MapOp, use other flag instead

fix a bug ParseMapOp only takes 1 callback

- Added WaitedDSCalabck

refactor callback param

fix text case incorrect number

- added testing

fix cpp test case

- added testing

- revert back lenet changes

- cleanup test_callbacks.py

- cleanup test_callbacks.py

fix CI stage I

fix CI stage II

fix CI and update epoch counter

- add validation
- add more testing  test_callbacks.py

use random data op to do tests

adjust when to call EpochBegin/End

- add repeat with callback

- addressing reviewers' comments

- docstring and CI fixes

- docstring and CI fixes

- docstring and CI fixes

- rebase with upstream/master

fix cpp test case

fix review comments

addr review cmts, add test case

Merge pull request !4498 from heleiwang/gnn_distributed

Merge pull request !4389 from yanghaitao/yht_fix_doc2

Merge pull request !4421 from ms_yan/api_comment

Merge pull request !4383 from genglishuai/genglshOK

Merge pull request !4366 from TinaMengtingZhang/cpp-api-repeat-count

Merge pull request !3651 from jiangzhiwen/dataset/change_num_samples

Merge pull request !3644 from liyong126/fix_mindrecord_bug

Merge pull request !3624 from yanghaitao/yht_generator_timeout