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from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
class EnvContext(dict):
"""Wraps env configurations to include extra rllib metadata.
These attributes can be used to parameterize environments per process.
For example, one might use `worker_index` to control which data file an
environment reads in on initialization.
RLlib auto-sets these attributes when constructing registered envs.
worker_index (int): When there are multiple workers created, this
uniquely identifies the worker the env is created in.
vector_index (int): When there are multiple envs per worker, this
uniquely identifies the env index within the worker.
def __init__(self, env_config, worker_index, vector_index=0):
dict.__init__(self, env_config)
self.worker_index = worker_index
self.vector_index = vector_index
def with_vector_index(self, vector_index):
return EnvContext(
self, worker_index=self.worker_index, vector_index=vector_index)