code: def _del_attr(obj: Any, names: str):
      """Helper function for `del_attr`. Deletes the attribute of an object.
  
      Parameters
      ----------
      obj : object
          The object to delete the attribute from.
      names : str
          The name of the attribute.
  
      """
      attrfcn = lambda obj, name: delattr(obj, name)  # noqa: E731
      dictfcn = lambda obj, key: obj.__delitem__(key)  # noqa: E731
  
      def listfcn(obj: Any, key):
          obj.__delitem__(key)
          obj.insert(key, None)  # to preserve the length
  
      return _traverse_attr(obj, names, attrfcn, dictfcn, listfcn)
  
file_path: deepchem/deepchem/utils/attribute_utils.py
imports: import re
  import ast
  from typing import Callable, Any
label_desc: Use image node_id 6 for calling a global function with example usage: _del_attr(obj, names) and returns: _traverse_attr