code: def get_bigdl_classpath():
      """
      Get and return the jar path for bigdl if exists.
      """
      if os.getenv("BIGDL_CLASSPATH"):
          return os.environ["BIGDL_CLASSPATH"]
      jar_paths = get_bigdl_jars()
      return ":".join(jar_paths)
  
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 6 for calling a global function with example usage: get_bigdl_classpath() and returns: str, os