Dev/thang/ola

[Devininthelab]

Before you open a pull-request, please check if a similar issue already exists or has been closed before.

When you open a pull-request, please be sure to include the following

• A descriptive title: [xxx] XXXX
• A detailed description

If you meet the lint warnings, you can use following scripts to reformat code.

pip install pre-commit
pre-commit install
pre-commit run --all-files

Thank you for your contributions!