Fixes #1010 and #1022

[AkashKarnatak]

No description provided.

[zhumingpassional]

thanks for your codes.
revison 1) last_state = trade_env.render()
last_state = trade_env.envs[0].render()
you revision aims to render the first env?

[zhumingpassional]

This branch has conflicts that must be resolved
could you pls revise it?

[AkashKarnatak]

thanks for your codes. revison 1) last_state = trade_env.render() last_state = trade_env.envs[0].render() you revision aims to render the first env?

yes, it tries to render the first env of DummyVecEnv.