code: def step(self, action):
      self.action = action
  
file_path: PARL/parl/env/tests/continuous_wrappers_test.py
imports: import gym
  import numpy
  import unittest
  from parl.env.continuous_wrappers import ActionMappingWrapper
label_desc: Use image node_id 2 for calling the MockEnv obj's underlying member method code with example usage: obj.step(action) without return types