* [Refactor] Refactor fileio but without breaking bc
* handle compatibility
* fix format
* modify io functions
* fix ut
* fix ut
* rename method names
* refine
* refine docstring
* fix ut in windows
* update ut
* minor fix
* ensure client is not None when closing it
* add more examples for list_dir_or_file interface
* refine docstring
* refine deprecated info
* fix ut
* add a description for lmdb docstring
* first commit
* update logging
* update MessageHub unit test and LogBuffer unitest
* update logging docs
* update logging impl and test
* update test logging
* update test
* update logging test and impl
* Fix logging test
* Update log_buffer.py
* rename statistics argumentes
* fix as comment
* Fix as comment
* Fix as comment
* Fix as comment
* Fix meta class
* Fix as comment
* Fix as comment
* Fix as comment
* Fix name declare
* Fix as comment
* Fix as comment
* Fix as comment
* Fix docstring
* Fix as comment
* Fix as comment