class_docstr: The average experience CPU usage metric.
  This plugin metric works only at eval time.
  
  After each experience, this metric emits the average CPU usage on that
  experience.
class_docstr_tok: ["The","average","experience","CPU","usage","metric",".","This","plugin","metric","works","only","at","eval","time",".","After","each","experience",",","this","metric","emits","the","average","CPU","usage","on","that","experience","."]
code: def __str__(self):
      return "CPUUsage_Exp"
  
imports: import os
  import warnings
  from typing import Optional, List
  from psutil import Process
  from avalanche.evaluation import Metric, PluginMetric, GenericPluginMetric
  from avalanche.evaluation.metrics import Mean
label_desc: Use image node_id 3 for calling the ExperienceCPUUsage obj's underlying member method code with example usage: obj.__str__() and returns: str