code: async def section_name(self, sec_name=None):
          
          if self.writing:
              fvalue = sec_name.encode('ascii')
              await x.dump_uint(self.iobj, len(fvalue), 1)
              await self.iobj.awrite(bytearray(fvalue))
  
          else:
              ivalue = await x.load_uint(self.iobj, 1)
              fvalue = bytearray(ivalue)
              await self.iobj.areadinto(fvalue)
              return bytes(fvalue).decode('ascii')
docs: Section name
          :param sec_name:
          :return: