code: def convert_lowercase(cfg):
      keys = cfg.keys()
      lowercase_keys = [key.lower() for key in keys]
      values = [cfg.get(key) for key in keys]
      for lowercase_key, value in zip(lowercase_keys, values):
          cfg.setdefault(lowercase_key, value)
      return cfg
  
file_path: nni/examples/nas/legacy/cream/lib/utils/util.py
imports: import sys
  import logging
  import torch
  import argparse
  import torch.nn
  from torch import optim
  from thop import profile, clever_format
  from timm.utils import *
  from lib.config import cfg
label_desc: Use image node_id 5 for calling a global function with example usage: convert_lowercase(cfg) and returns: cfg