class_docstr: Implementation of the random-dot motion environment 
class_docstr_tok: ["Implementation","of","the","random-dot","motion","environment"]
code: def reset(self, dot_direction=None, sampling_state=None):
      if dot_direction is not None:
          self._dot_dir = dot_direction
          self._generate_dot_dist()
  
      if sampling_state is not None:
          self._set_sampling_state(sampling_state)
  
      return self._get_observation()
  
imports: from pymdp.envs import Env
  from pymdp import utils, maths
  import numpy
  from itertools import permutations, product
label_desc: Use image node_id 2 for calling the RandomDotMotion obj's underlying member method code with example usage: obj.reset(dot_direction, sampling_state) and returns: self