code: def GridWorld(gridmap=None, is_slippery=False):
      if gridmap is None:
          gridmap = ["SFFF", "FHFH", "FFFH", "HFFG"]
      env = gym.make("FrozenLake-v0", desc=gridmap, is_slippery=False)
      env = FrozenLakeWapper(env)
      return env
  
file_path: PARL/examples/tutorials/lesson1/gridworld.py
imports: import gym
  import turtle
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: GridWorld(gridmap, is_slippery) and returns: env