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Add meltingpot MultiagentDictKeyWrapper support #261

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Add meltingpot MultiagentDictKeyWrapper support #261

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9 changes: 6 additions & 3 deletions acme/wrappers/multiagent_dict_key_wrapper.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,8 @@


class MultiagentDictKeyWrapper(base.EnvironmentWrapper):
"""Wrapper that converts list-indexed multiagent environments to dict-indexed.
"""Wrapper that converts list or tuple indexed multiagent environments
to dict-indexed.

Specifically, if the underlying environment observation and actions are:
observation = [observation_agent_0, observation_agent_1, ...]
Expand All @@ -49,8 +50,10 @@ def __init__(self, environment: dm_env.Environment):
self._reward_spec = self._list_to_dict(self._environment.reward_spec())

def _list_to_dict(self, data: Union[List[V], V]) -> Union[Dict[str, V], V]:
"""Convert list-indexed data to dict-indexed, otherwise passthrough."""
if isinstance(data, list):
"""Convert list or tuple indexed data to dict-indexed, otherwise
passthrough.
"""
if isinstance(data, list) or isinstance(data, tuple):
return {str(k): v for k, v in enumerate(data)}
return data

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