class_docstr: Parallel RL learning environments.
class_docstr_tok: ["Parallel","RL","learning","environments","."]
code: def step(self, action):
      raise NotImplementedError()
  
file_path: chainerrl/chainerrl/env.py
imports: from abc import ABCMeta
  from abc import abstractmethod
label_desc: Use image node_id 1 for calling the VectorEnv obj's underlying member method code with example usage: obj.step(action) without return types