removed gym as a dev dependency

[zbenmo]

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[nuance1979]

Why do you need to remove gym? We keep gym in dev in order to test backward compatibility through shimmy.

[zbenmo]

Sure. Makes sense. I have installed Tianshou latest version no brackets dev and there was a gym dependency. Which my environment did not like as I also had another gym version. That was my real concern.

…

On Tue, Feb 28, 2023, 2:04 AM Yi Su ***@***.***> wrote: Why do you need to remove gym? We keep gym in dev in order to test backward compatibility through shimmy <https://github.com/Farama-Foundation/Shimmy>. — Reply to this email directly, view it on GitHub <#813 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAL7U3SPX3MZ56S4POUVZRLWZVFLNANCNFSM6AAAAAAVJUIU5A> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[nuance1979]

The gym dependency is replaced with gymnasium in #789 , specifically here. Tianshou's next release should not have gym dependency unless [dev] is used.

Until the next release, you can either remove gym manually or install Tianshou's master branch.