Depending on Python is actually much better than dependencies on other runtimes, just as Java. Firstly, Python is everywhere now. And secondly, you can just 'pip install --user' and use it even without root privileges (which is a great thing if you're in a restricted corporate environment).

It's pretty easy to install Python on Mac (use Brew) or Windows (use WinPython), and most Linux distros include it by default... running an installer is hardly an onerous task.