code: def evalRPN(self, tokens):
      stack = []
  
      for token in tokens:
          if token not in "+-/*":
              stack.append(int(token))
              continue
  
          number_2 = stack.pop()
          number_1 = stack.pop()
  
          result = 0
          if token == "+":
              result = number_1 + number_2
          elif token == "-":
              result = number_1 - number_2
          elif token == "*":
              result = number_1 * number_2
          else:
              result = int(number_1 / number_2)
  
          stack.append(result)
  
      return stack.pop()
  
label_desc: Use image node_id 1 for calling the Solution obj's underlying member method code with example usage: obj.evalRPN(tokens) and returns: stack