code: def list2str(l: List[int]) -> str:
      """Converts list to a string"""
      return " ".join([str(x) for x in l])
  
imports: import os
  import time
  from typing import Callable, Dict, List, Optional, Union
  import numpy
  import torch
  import torch.nn.functional
  from matplotlib import pyplot
  from sklearn.metrics import classification_report, confusion_matrix
  from torch import Tensor
  from nemo.collections.nlp.modules.common.megatron.utils import erf_gelu
  from nemo.collections.nlp.modules.common.megatron.utils import openai_gelu
  from nemo.collections.nlp.modules.common.megatron.utils import squared_relu
  from nemo.utils import logging
label_desc: Use image node_id 2 for calling a global function with example usage: list2str(l) and returns: str