docstr: initialize with the necessary elements
docstr_tok: ["initialize","with","the","necessary","elements"]
code: def _initialize(self, use_gpu=False, enable_mkldnn=False):
      """
      initialize with the necessary elements
      """
      cfg = self.merge_configs()
  
      cfg.use_gpu = use_gpu
      if use_gpu:
          try:
              _places = os.environ["CUDA_VISIBLE_DEVICES"]
              int(_places[0])
              print("use gpu: ", use_gpu)
              print("CUDA_VISIBLE_DEVICES: ", _places)
              cfg.gpu_mem = 8000
          except:
              raise RuntimeError(
                  "Environment Variable CUDA_VISIBLE_DEVICES is not set correctly. If you wanna use gpu, please set CUDA_VISIBLE_DEVICES via export CUDA_VISIBLE_DEVICES=cuda_device_id."
              )
      cfg.ir_optim = True
      cfg.enable_mkldnn = enable_mkldnn
  
      self.ser_predictor = SerPredictor(cfg)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import sys
  import copy
  import time
  import paddlehub
  from paddlehub.common.logger import logger
  from paddlehub.module.module import moduleinfo, runnable, serving
  import cv2
  import numpy
  import paddlehub
  from tools.infer.utility import base64_to_cv2
  from ppstructure.kie.predict_kie_token_ser import SerPredictor
  from ppstructure.utility import parse_args
  from deploy.hubserving.kie_ser.params import read_params
label_desc: Use image node_id 1 for calling the KIESer obj's underlying member method code with example usage: obj._initialize(use_gpu, enable_mkldnn) without return types