code: def initialize_empty_B(num_states, num_controls):
      """
      Initializes an empty (controllable) transition likelihood array or `B` array using a list of hidden state factor dimensions (`num_states`)
      and control factor dimensions (`num_controls)
      """
  
      B_shape_list = [
          [ns, ns, num_controls[f]] for f, ns in enumerate(num_states)
      ]
      return obj_array_zeros(B_shape_list)
  
imports: import numpy
  import pandas
  import seaborn
  import matplotlib.pyplot
  import warnings
  import itertools
label_desc: Use image node_id 6 for calling a global function with example usage: initialize_empty_B(num_states, num_controls) and returns: obj_array_zeros