code: def node_validate(node_dict, node_num, cmd_name):
      
      # cmd: [required-state, action-to-displayed, error-statement]
      req_lu = {"run": ["stopped", "Already Running"],
                "stop": ["running", "Already Stopped"],
                "connect": ["running", "Can't Connect, Node Not Running"],
                "details": [node_dict[node_num].state, ""]}
      tm = {True: ("Node {1}{2}{0} ({5}{3}{0} on {1}{4}{0})".
                   format(C_NORM, C_WARN, node_num,
                          node_dict[node_num].name,
                          node_dict[node_num].cloud_disp, C_TI)),
            False: req_lu[cmd_name][1]}
      node_valid = bool(req_lu[cmd_name][0] == node_dict[node_num].state)
      node_info = tm[node_valid]
      return node_valid, node_info
docs: Validate that command can be performed on target node.