code: def init(expt_dir, arg_string):
      args = util.unpack_args(arg_string)
      return GPEIChooser(expt_dir, **args)
  
imports: import os
  from ..None import gp
  import sys
  from ..None import util
  import tempfile
  import numpy
  import numpy.random
  import scipy.linalg
  import scipy.stats
  import scipy.optimize
  import pickle
  from ..Locker import *
  from ..helpers import *
  import logging
label_desc: Use image node_id 1 for calling a global function with example usage: init(expt_dir, arg_string) and returns: GPEIChooser