code: def numberToWords(self, num):
      """
      :type num: int
      :rtype: str
      """
  
      def one(num):
          switcher = {
              1: "One",
              2: "Two",
              3: "Three",
              4: "Four",
              5: "Five",
              6: "Six",
              7: "Seven",
              8: "Eight",
              9: "Nine",
          }
          return switcher.get(num)
  
      def two_less_20(num):
          switcher = {
              10: "Ten",
              11: "Eleven",
              12: "Twelve",
              13: "Thirteen",
              14: "Fourteen",
              15: "Fifteen",
              16: "Sixteen",
              17: "Seventeen",
              18: "Eighteen",
              19: "Nineteen",
          }
          return switcher.get(num)
  
      def ten(num):
          switcher = {
              2: "Twenty",
              3: "Thirty",
              4: "Forty",
              5: "Fifty",
              6: "Sixty",
              7: "Seventy",
              8: "Eighty",
              9: "Ninety",
          }
          return switcher.get(num)
  
      def two(num):
          if not num:
              return ""
          elif num < 10:
              return one(num)
          elif num < 20:
              return two_less_20(num)
          else:
              tenner = num // 10
              rest = num - tenner * 10
              return (
                  ten(tenner) + " " + one(rest) if rest else ten(tenner)
              )
  
      def three(num):
          hundred = num // 100
          rest = num - hundred * 100
          if hundred and rest:
              return one(hundred) + " Hundred " + two(rest)
          elif not hundred and rest:
              return two(rest)
          elif hundred and not rest:
              return one(hundred) + " Hundred"
  
      billion = num // 1000000000
      million = (num - billion * 1000000000) // 1000000
      thousand = (
          num - billion * 1000000000 - million * 1000000
      ) // 1000
      rest = (
          num
          - billion * 1000000000
          - million * 1000000
          - thousand * 1000
      )
  
      if not num:
          return "Zero"
  
      result = ""
      if billion:
          result = three(billion) + " Billion"
      if million:
          result += " " if result else ""
          result += three(million) + " Million"
      if thousand:
          result += " " if result else ""
          result += three(thousand) + " Thousand"
      if rest:
          result += " " if result else ""
          result += three(rest)
      return result
  
label_desc: Use image node_id 1 for calling the Solution obj's underlying member method code with example usage: obj.numberToWords(num) and returns: result, switcher, switcher, switcher, str, str, unknown, one, two, two_less_20, unknown, unknown