code: def set_default_host(cls, value):
          
          if value is None:
              cls.DEFAULT_HOST = "http://127.0.0.1:80"
          else:
              scheme, host, port = get_hostname_parameters_from_url(value)
              cls.DEFAULT_HOST = "%s://%s:%s" % (scheme, host, port)
docs: Default: "http://127.0.0.1:80"
  
          A string that will be automatically included at the beginning of the url generated for doing each http request.