* [DOC] Fix comment code of API create_py_reader_by_data. test=develop, test=document_preview

* Fix code style of API comment. test=develop,test=document_preview

Fix code style of API comment. test=develop,test=document_preview

* update api spec of api create_py_reader_by_data

* remove default config code. test=develop

* remove useless code. test=develop

* update create_py_reader_by_data api. test=develop