class_docstr: A reward shaping wraper
class_docstr_tok: ["A","reward","shaping","wraper"]
code: def __init__(self, env):
      RewardShaping.__init__(self, env)
  
imports: import abc
  import copy
  import gym
  import math
  import numpy
  from collections import OrderedDict
  from osim.env import L2M2019Env
  from parl.utils import logger
label_desc: Use image node_id 1 to create a new ForwardReward object from inherited base classes: RewardShaping with example: obj = ForwardReward(env)