new_contents: class ShareList:
      '''class contains lists which are shared'''
      shared_shopping_list_container = []
      shareditemsdictionary={}
  
      def shared_shopping_list_container(self):
          return self.shared_shopping_list_container
  
      def shareditemsdictionary(self):
          return self.shareditemsdictionary
  
      def add_shared_shopping_list(self,listname):
          self.shared_shopping_list_container.append(listname)
          return shared_shopping_list_container
  
  
subject: add class sharelist for sharing shopping lists