text: import numpy as np
  import os
  x = np.arange(12).reshape(4, 3)
  print("Original array:")
  print(x)
  header = 'col1 col2 col3'
  np.savetxt('temp.txt', x, fmt="%d", header=header) 
  print("After loading, content of the text file:")
  result = np.loadtxt('temp.txt')
  print(result)