Installing an earlier version of stable-baselines3-contrib (version 1.0) results in endless backtracking of some dependencies about stable-baselines3-contrib

[araffin]

Hello,

thanks for spotting this issue, this is due to SB3 contrib trying to install stable-baselines3[tests,docs] (I removed that full dep in 61bfdbc so the issue is not present with sb3-contrib>=1.1.0).
The first solution is to install !pip install stable-baselines3[tests,docs]==1.0 first (takes a while though because of the backtracking).

If you want to make things faster, you can use --use-deprecated=legacy-resolver or --no-deps (if SB3 is already installed, this is the recommended way) as suggested in stack overflow.

[amy12xx]

Thanks @araffin , I can use the workaround.