code: def eye_color(person):
      random_variables = {x.name: x for x in ed.random_variables()}
      if person + "/" in random_variables:
          return random_variables[person + "/"]
      else:
          return Categorical(probs=tf.ones(3) / 3, name=person)
  
imports: import edward
  import tensorflow
  from edward.models import Categorical
label_desc: Use image node_id 1 for calling a global function with example usage: eye_color(person) and returns: random_variables, Categorical