code: def load_img(self, path):
      img = self.imread(path)
      img = scipy.misc.imresize(img, self.img_res)
      img = img / 127.5 - 1.0
      return img[np.newaxis, :, :, :]
  
imports: import pickle
  import os
  from keras.datasets import mnist, cifar100, cifar10
  from keras.preprocessing.image import ImageDataGenerator, load_img, save_img, img_to_array
  import pandas
  import numpy
  from os import walk, getcwd
  import h5py
  import scipy
  from glob import glob
  from keras.applications import vgg19
  from keras import backend
  from keras.utils import to_categorical
  import pdb
label_desc: Use image node_id 4 for calling the DataLoader obj's underlying member method code with example usage: obj.load_img(path) and returns: img