code: def ensure_file(path):
      """
      Ensure that a file exists. This will create any parent directories needed
      and create an empty file if it does not exist.
  
      Parameters
      ----------
      path : str
          The file path to ensure exists.
      """
      ensure_directory_containing(path)
      open(path, "a+").close()
  
file_path: zipline/zipline/utils/paths.py
imports: from errno import EEXIST
  import os
  from os.path import exists, expanduser, join
  import pandas
label_desc: Use image node_id 4 for calling a global function with example usage: ensure_file(path) without return types