code: def _derive_hadoop_classpath():
      import subprocess
  
      find_args = (
          "find",
          "-L",
          os.environ["HADOOP_HOME"],
          "-name",
          "*.jar",
      )
      find = subprocess.Popen(find_args, stdout=subprocess.PIPE)
      xargs_echo = subprocess.Popen(
          ("xargs", "echo"), stdin=find.stdout, stdout=subprocess.PIPE
      )
      jars = subprocess.check_output(
          ("tr", "' '", "':'"), stdin=xargs_echo.stdout
      )
      hadoop_conf = (
          os.environ["HADOOP_CONF_DIR"]
          if "HADOOP_CONF_DIR" in os.environ
          else os.environ["HADOOP_HOME"] + "/etc/hadoop"
      )
      return (hadoop_conf + ":").encode("utf-8") + jars
  
imports: import os
  import posixpath
  import sys
  import warnings
  from pyarrow.util import doc, _DEPR_MSG
  from pyarrow.filesystem import FileSystem
  import pyarrow._hdfsio
label_desc: Use image node_id 2 for calling a global function with example usage: _derive_hadoop_classpath() and returns: unknown