[pydrake] Honor None action/observation spaces in DrakeGymEnv - #24935
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[pydrake] Honor None action/observation spaces in DrakeGymEnv#24935castor639 wants to merge 1 commit into
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When action_space or observation_space is None and the corresponding port is vector-valued, build a gym.spaces.Box of the port size with ±infinity bounds, matching the documented API. Non-vector ports still require an explicit Space.
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+(component: pydrake) Assigning +a:@rpoyner-tri as pydrake lead; feel free to re-delegate.
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Reviewable status: LGTM missing from assignee rpoyner-tri(platform), needs at least two assigned reviewers, missing label for release notes (waiting on rpoyner-tri).
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When action_space or observation_space is None and the corresponding port is vector-valued, build a gym.spaces.Box of the port size with ±infinity bounds, matching the documented API. Non-vector ports still require an explicit Space.
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