[Feature Request] Publish a class interface - AbstractVecEnv

[ikamensh]

Motivation

I'm developing with envpool dependency from macos, and I can't install it. As a result I can't see what methods are available on envpool.env object; I also can't use type checking to verify my code has no obvious bugs. This probably would still be the case on Linux, but I'm not as sure.

Solution

An interface that describes public methods and fields of vecenv, which is ideally installable as pip install envpool[interface], would allow me to have all type checks / hints from IDE. It would also define clearly on what functionality dependencies can depend on, and what are private implementation details.

Alternatives

• do nothing - developers can just read docs / run code to see if they use correct fields / methods

Checklist

• I have checked that there is no similar issue in the repo (required)