code: def _format_output(selected_number, raw_data):
      
      tmp_data = {}
      data = collections.defaultdict(lambda: 0)
      balance = raw_data.pop('balance')
      for number in raw_data.keys():
          tmp_data = dict([(k, int(v) if v is not None else "No limit")
                           for k, v in raw_data[number].items()])
          tmp_data['number'] = number
          if selected_number is None or selected_number == number:
              data[number] = tmp_data
  
      output = ("""Account Balance
  =======
  
  Balance:      {:.2f} $
  """)
      print(output.format(balance))
      for number_data in data.values():
          _print_number(number_data)
docs: Format data to get a readable output