text: import numpy as np
  
  dim0 = 1                                                                             # STEP 0
  #  or dim0 = 10 
  shape0 = (dim0)                                                                      # STEP 1
  #  or shape0 = (dim0, dim0) 
  #  or shape0 = (dim0, dim0, dim0) 
  array0 = np.ones(shape0)                                                             # STEP 2
  array0 = array0 + array0                                                             # STEP 3
  array0 = array0 + array0                                                             # STEP 4
  #  or array0 = array0 * array0 
  array0 = array0 * array0                                                             # STEP 5
  array0 = array0 * array0                                                             # STEP 6
  array0 = array0 * array0                                                             # STEP 7
  array0 = array0 * array0                                                             # STEP 8
  array0 = array0 * array0                                                             # STEP 9
  array0 = array0 * array0                                                             # STEP 10
  array0 = array0 * array0                                                             # STEP 11
  array0 = array0 * array0                                                             # STEP 12
  array0 = array0 * array0                                                             # STEP 13
  array0 = array0 - array0                                                             # STEP 14
  #  or array1 = array0 - array0 
  #  or array2 = array0 - array0 
  #  or array3 = array0 - array0 
  #  or array4 = array0 - array0 
  #  or array5 = array0 - array0 
  assert (np.array_equal(array0,array0))
  