class_docstr: 1-dimensional grid-world implementation with 3 possible movement actions ("LEFT", "STAY", "RIGHT")
code: def sample_action(self):
      return np.random.randint(self.n_control)
  
imports: import numpy
  import matplotlib.pyplot
  import seaborn
  from pymdp.envs import Env
label_desc: Use image node_id 11 for calling the DGridWorldEnv obj's underlying member method code with example usage: obj.sample_action() and returns: np