code: def from_state(state):
      running_stats = RunningStat()
      running_stats.num_pushes = state["num_pushes"]
      running_stats.mean_array = _deserialize_ndarray(
          state["mean_array"]
      )
      running_stats.std_array = _deserialize_ndarray(state["std_array"])
      return running_stats
  
imports: import logging
  import threading
  import numpy
  import tree
  from ray.rllib.utils.annotations import DeveloperAPI
  from ray.rllib.utils.deprecation import Deprecated
  from ray.rllib.utils.numpy import SMALL_NUMBER
  from ray.rllib.utils.typing import TensorStructType
  from ray.rllib.utils.serialization import _serialize_ndarray, _deserialize_ndarray
  from ray.rllib.utils.deprecation import deprecation_warning
label_desc: Use image node_id 12 for calling the RunningStat obj's underlying member method code with example usage: obj.from_state(state) and returns: running_stats