Not sure if there is a better way addressing the issue, please review.
Ps. I've added a static folder in the project root directory for test purpose, this is absolutely not a best practice, we may need create another PR to restructure the test file under a tests folder.

we may need create another PR to restructure the test file under a tests folder.

Yep, this project needs a huge refactor. I'm considering a 2.0 version (drop Python 2 support, remove deprecated codes, etc). For now, I think we need to make the building work first. I currently have no time to test this, maybe review it next week.