code: def contains(self, url: str):
          '''Return whether the URL is in the table.'''
  
          try:
              self.get_one(url)
          except NotFound:
              return False
          else:
              return Truf contains(self, url: str):
          '''Return whether the URL is in the table.'''
  
          try:
              self.get_one(url)
          except NotFound:
              return False
          else:
              return True
docs: Return whether the URL is in the table.