code: def request(self,
                  hostport=None,
                  service=None,
                  arg_scheme=None,
                  retry=None,
                  **kwargs):
          
          # TODO disallow certain parameters or don't propagate them backwards.
          # For example, blacklist and rank threshold aren't really
          # user-configurable right now.
          return self.peers.request(hostport=hostport,
                                    service=service,
                                    arg_scheme=arg_scheme,
                                    retry=retry,
                                    **kwargs)
docs: Initiate a new request through this TChannel.
  
          :param hostport:
              Host to which the request will be made. If unspecified, a random
              known peer will be picked. This is not necessary if using
              Hyperbahn.
  
          :param service:
              The name of a service available on Hyperbahn. Defaults to an empty
              string.
  
          :param arg_scheme:
              Determines the serialization scheme for the request. One of 'raw',
              'json', or 'thrift'. Defaults to 'raw'.
  
          :param rety:
              One of 'n' (never retry), 'c' (retry on connection errors), 't'
              (retry on timeout), 'ct' (retry on connection errors and timeouts).
  
              Defaults to 'c'.