Xin Wang

`System.getenv(ANDROID_HOME)` will return `null` in Windows OS even if user specified the value. It dosen't works unless restarting the machine.

Thanks @dan-blanchard I'd love to hear from pyleus contributors.

cc @HeartSaVioR You might be interested in this improvement.

@HeartSaVioR Agree with you. We should have a discussion about multi-lang support. (Can open a thread on dev@ mailing list)

Overall looks good to me. Thanks @dlg99 for the great job. And do you have any updates for @agresch and @bipinprasad comments?

I also didn't do this before. pre-commit looks like a good candidate.