code: def __call__(self, agent_id):
      assert agent_id < self.out_dim
      one_hot_id = np.zeros(self.out_dim, dtype="float32")
      one_hot_id[agent_id] = 1.0
      return one_hot_id
  
imports: import numpy
label_desc: Use image node_id 2 for calling the OneHotTransform obj's underlying member method code with example usage: obj.__call__(agent_id) and returns: one_hot_id