Copied from: https://github.com/openai/baselines/blob/ea25b9e8b234e6ee1bca43083f8f3cf974143998/baselines/common/mpi_util.py#L110 Perform a weighted average over dicts that are each on a different node Input: local_name2valcount: dict mapping key -> (value, count) Returns: key -> mea
(comm, local_name2valcount)
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