Hi, The custom eval exmaple failed [https://github.com/ray-project/ray/blob/master/rllib/examples/custom_eval.py] when “evaluation_num_workers” = 1
File “ppo_Training.py”, line 78, in custom_eval_function
worker_1.foreach_env.remote(lambda env: env.set_intermediate_flags(True, True, validationSeed, validationTrial))
AttributeError: ‘list’ object has no attribute ‘foreach_env’
could anyone please provide a sample code, such that it works with one eval worker.