code: def _set_K_H(self, k, h):
          "used by a kex object to set the K (root key) and H (exchange hash)"
          self.K = k
          self.H = h
          if self.session_id == None:
              self.session_id = f _set_K_H(self, k, h):
          "used by a kex object to set the K (root key) and H (exchange hash)"
          self.K = k
          self.H = h
          if self.session_id == None:
              self.session_id = h
docs: used by a kex object to set the K (root key) and H (exchange hash)