parameters: (self, l1, l2)
return_statement: return h.next
docstring: :type l1: ListNode
          :type l2: ListNode
          :rtype: ListNode
docstring_summary: :type l1: ListNode
          :type l2: ListNode
          :rtype: ListNode
docstring_tokens: : type l1 : ListNode : type l2 : ListNode : rtype : ListNode
function: def addTwoNumbers(self, l1, l2):
          """
          :type l1: ListNode
          :type l2: ListNode
          :rtype: ListNode
          """
          stack_list1, stack_list2, stack_list3 = list(), list(), list()
          h = ListNode(-1)
          cur = h
  
          while l1 != None:
              stack_list1.append(l1.val)
              l1 = l1.next
  
          while l2 != None:
              stack_list2.append(l2.val)
              l2 = l2.next
  
          add = 0
          while stack_list1 or stack_list2 or add:
              if stack_list1:
                  top1 = stack_list1.pop()
              else:
                  top1 = 0
              if stack_list2:
                  top2 = stack_list2.pop()
              else:
                  top2 = 0
              val = top1 + top2 + add
              add = val // 10
              stack_list3.append(val%10)
  
          while stack_list3:
              cur.next = ListNode(stack_list3.pop())
              cur = cur.next
  
          return h.next
function_tokens: def addTwoNumbers ( self , l1 , l2 ) : stack_list1 , stack_list2 , stack_list3 = list ( ) , list ( ) , list ( ) h = ListNode ( - 1 ) cur = h while l1 != None : stack_list1 . append ( l1 . val ) l1 = l1 . next while l2 != None : stack_list2 . append ( l2 . val ) l2 = l2 . next add = 0 while stack_list1 or stack_list2 or add : if stack_list1 : top1 = stack_list1 . pop ( ) else : top1 = 0 if stack_list2 : top2 = stack_list2 . pop ( ) else : top2 = 0 val = top1 + top2 + add add = val // 10 stack_list3 . append ( val % 10 ) while stack_list3 : cur . next = ListNode ( stack_list3 . pop ( ) ) cur = cur . next return h . next