env conflict ray and gym

[tianmengjie123]

ERROR: Cannot install copo==0.0.0 and ray[rllib]==2.2.0 because these package versions have conflicting dependencies.

The conflict is caused by:
copo 0.0.0 depends on gym==0.19.0
ray[rllib] 2.2.0 depends on gym<0.24.0 and >=0.21.0; extra == "rllib"

To fix this you could try to:

1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts