code: def write_data_file(data_file_path, content):
      with open(data_file_path, "wb") as file:
          file.write(content)
  
file_path: BigDL/python/ppml/src/bigdl/ppml/kms/ehsm/file_operator.py
imports: from key_manager import retrieve_data_key_plaintext
  from cryptography.fernet import Fernet
  import os, csv, io
label_desc: Use image node_id 2 for calling a global function with example usage: write_data_file(data_file_path, content) without return types