@MichaelRyanSoileau: you can already do that in Python via
pip install -r requirements.txt
`requirements.txt` is the equivalent of `package.json`
I don’t like the fact that a module-dependency file (package.json) can also run tests, do builds, and arbitrary stuff. I prefer the single responsibility principle approach of pip’s `requirements.txt` which just does one thing — specify dependencies — and I think it does it fairly well, especially in combination with `virtualenv` and `virtualenvwrapper`.
I’ve experienced excruciatingly-intricate “dependency hell” scenarios with npm. Scenarios where the developer says “It builds fine on my laptop” but the “npm install” installs a backward-incompatible dependency on a clean system that breaks the build. Tracking down the culprit package can be very painful in my experience. `npm shrinkwrap` also doesn’t save the day here because it too can error out (extraneous dependencies and bad peer dependencies: problems that still recur even with the latest versions of npm).
Of course, “dependency hell” also happens sometimes in Python/pip. We really need better package management system in general.