code: def get_cuda_root():
      # We look for the cuda path since we need headers from there
      v = os.getenv("CUDA_ROOT", "")
      if v:
          return v
      v = os.getenv("CUDA_PATH", "")
      if v:
          return v
      s = os.getenv("PATH")
      if not s:
          return ""
      for dir in s.split(os.path.pathsep):
          if os.path.exists(os.path.join(dir, "nvcc")):
              return os.path.dirname(os.path.abspath(dir))
      return ""
  
imports: from __future__ import absolute_import, print_function, division
  import errno
  import os
  import sys
  import logging
  import numpy
  import platform
  import textwrap
  import re
  import socket
  import struct
  import warnings
  from six import string_types
  import theano
  from theano.configparser import AddConfigVar, BoolParam, ConfigParam, EnumStr, FloatParam, IntParam, StrParam, TheanoConfigParser, THEANO_FLAGS_DICT
  from theano.misc.cpucount import cpuCount
  from theano.misc.windows import call_subprocess_Popen, output_subprocess_Popen
  from theano.compat import maybe_add_to_os_environ_pathlist
label_desc: Use image node_id 3 for calling a global function with example usage: get_cuda_root() and returns: str, v, v, str, os