class_docstr: Mixin class to add logging capability in a two player discrete game.
  Logs the frequency of each state.
class_docstr_tok: ["Mixin","class","to","add","logging","capability","in","a","two","player","discrete","game",".","Logs","the","frequency","of","each","state","."]
code: def _init_info(self):
      self.cc_count = []
      self.dd_count = []
      self.cd_count = []
      self.dc_count = []
  
file_path: ray/rllib/examples/env/utils/mixins.py
imports: from abc import ABC
  import numpy
  from ray.rllib.examples.env.utils.interfaces import InfoAccumulationInterface
label_desc: Use image node_id 1 for calling the TwoPlayersTwoActionsInfoMixin obj's underlying member method code with example usage: obj._init_info() without return types