code: def purge(root=os.path.join(base.data_dir(), "models")):
      r"""Purge all pretrained model files in local file store.
  
      Parameters
      ----------
      root : str, default '$MXNET_HOME/models'
          Location for keeping the model parameters.
      """
      root = os.path.expanduser(root)
      files = os.listdir(root)
      for f in files:
          if f.endswith(".params"):
              os.remove(os.path.join(root, f))
  
file_path: mxnet/python/mxnet/gluon/model_zoo/model_store.py
imports: import os
  import zipfile
  import logging
  import uuid
  from ..utils import download, check_sha1, replace_file, TemporaryDirectory
  from ...None import base
label_desc: Use image node_id 3 for calling a global function with example usage: purge(root) without return types