code: def as_live(self):
          
          key = self.get_key()
          default = pyconfig.get(key)
          if default:
              default = repr(default)
          else:
              default = self._default() or NotSet()
          return "%s = %s" % (key, default)
docs: Return this call as if it were being assigned in a pyconfig namespace,
          but load the actual value currently available in pyconfig.