code: async def sunion(self, keys, *args):
          "Return the union of sets specified by ``keys``"
          args = list_or_args(keys, args)
          return await self.execute_command('SUNION', *argsync def sunion(self, keys, *args):
          "Return the union of sets specified by ``keys``"
          args = list_or_args(keys, args)
          return await self.execute_command('SUNION', *args)
docs: Return the union of sets specified by ``keys``