PyMiniRacer VS InsideReCaptcha

Embedding V8 can work quite well: https://github.com/sqreen/PyMiniRacer

You probably have to emulate some of the DOM, but you can interact directly with whatever obfuscated/packed scripts in a more lightweight and secure way than driving an entire browser.

First learn what forms computer code can be in. Source code combine js and python or to combine c and C++ object code with a linker or at runtime if you want to shell out and run from the prompt

If you want battle-hardened, I figure you can't do better than V8. Here's a Python wrapper that I've poked at a bit (it's not quite 100% feature-complete but it seems to essentially work): https://github.com/sqreen/PyMiniRacer

Google: implements an entire obfuscated VM with its own bytecode inside Javascript for their CAPTCHAs so that people cannot cheat it

While they likely wouldn't do a zero-day, their JS files, particularly for automated captchas, do push the boundaries of whatever JS engine they're executed inside. See https://github.com/neuroradiology/InsideReCaptcha#the-analys... and note that this analysis is 8 years old. While there's minimal risk if you're either using a full-fledged modern JS engine or a limited-subset interpreter like the OP, an older or non-optimized spec-compliant JS engine might hit pathological performance cases and result in you DOSing yourself.

So people voting for DCR are not allowed to protect their privacy with VPNs, must reveal their real IP address, and must allow proprietary, obfuscated, sophisticated Google reCAPTCHA to fingerprint the heck out of their devices.