code: def prepare_env():
      __prepare_spark_env()
      __prepare_bigdl_env()
  
file_path: BigDL/python/dllib/src/bigdl/dllib/utils/engine.py
imports: import sys
  import os
  import glob
  import warnings
  import logging
  from bigdl.dllib.utils.log4Error import *
label_desc: Use image node_id 11 for calling a global function with example usage: prepare_env() without return types