[Feature Request] Remove `env.dtype` attribute
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@vmoens is already working on this.
Since Feb 10, 2022.
enhancement
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Description
Initially the plan was for an environment to have some dtype associated. This was supposed to support actions, obs and reward.
However it makes little sense when observations are multiple tensors. Also, an action could be a floating point number and the observation a uint8 tensor.
We should rely only on env.observation_spec.dtype (or action_spec) to infer dtype.
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