code: def click_load(self):
      if self.__recognizer.load_knowledge() is not True:
          messagebox.showwarning(
              "Recognition - Knowledge Loading",
              "Knowledge represented by self-organized feature map has not been "
              "load from hardware to recognizer due to lack of saved dump of that object. "
              "Please save knowledge dump after training and after that it will be possible "
              "to use load it at any time.",
          )
  
imports: from pyclustering.nnet.som import som, type_conn
  from pyclustering.samples.definitions import IMAGE_DIGIT_SAMPLES
  from pyclustering.utils import read_image, rgb2gray
  from tkinter import *
  from tkinter import messagebox
  import math
  import pickle
  import os
  import random
label_desc: Use image node_id 4 for calling the digit_application obj's underlying member method code with example usage: obj.click_load() without return types