Potential Unused Variable eps_returns in examples/baselines/ppo/ppo.py

[songyuc]

Hello developers,

I'm a student and I was reviewing the code in examples/baselines/ppo/ppo.py. I noticed a variable named eps_returns that is initialized here:

eps_returns = torch.zeros(args.num_envs, dtype=torch.float, device=device)

After inspecting the codebase, I couldn't find any instances where this variable is used (read or modified) after its initialization.

I was wondering if this variable is a leftover from previous development or if it has a purpose that I might be missing.

Thank you for your time and clarification!