code: def dict2str(result_dict):
      r"""convert result dict to str
  
      Args:
          result_dict (dict): result dict
  
      Returns:
          str: result str
      """
  
      return "    ".join(
          [
              str(metric) + " : " + str(value)
              for metric, value in result_dict.items()
          ]
      )
  
imports: import datetime
  import importlib
  import os
  import random
  import pandas
  import numpy
  import torch
  import torch.nn
  from torch.utils.tensorboard import SummaryWriter
  from texttable import Texttable
  from recbole.utils.enum_type import ModelType
label_desc: Use image node_id 7 for calling a global function with example usage: dict2str(result_dict) and returns: str