Error: int object does not support item assignment

[ankita_nthu]

Dear All,

I want to know how to remove this type of error. In this code i want to flip the values. But if I flip by giving 1D array index it flips and no error but if i have 2D List its not working and give this error. Please help me in this regard. What I have to change.

My part of code in error is below:
For example:one part of decoding process

add_attempt=4
LLR_L = signal.copy() * 2 / pow(sigma, 2)
LLR_L_ = LLR_L
    
indexes = np.argsort(np.abs(LLR_L))[:add_attempt]

comb =[]
    for i in indexes:
        comb.append(i)

COMB = []
    for L in range(0, len(comb) + 1):
        for subset in itertools.combinations(comb, L):
            COMB.append(subset)

   for i_flip in range(len(COMB)):
       L[:, n] = LLR_L_
           decoding process function here( if fails)
           else:
              LLR_L_ = LLR_L
              for j in range(len(COMB[i_flip])):
                  if LLR_L[COMB[i_flip][j]] > 0:
                     LLR_L_[COMB[i_flip][j]] = (-1) * 10
                  else:
                     LLR_L_[COMB[i_flip][j]] = 10

This code have an output I print just to know what is stored in these functions and error

Output:
indexes [ 3 14  5 22]
comb [3, 14, 5, 22]

COMB [(), (3,), (14,), (5,), (22,), (3, 14), (3, 5), (3, 22), (14, 5), (14, 22), (5, 22), (3, 14, 5), (3, 14, 22), (3, 5, 22), (14, 5, 22), (3, 14, 5, 22)]

error

Output:
Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\multiprocessing\pool.py", line 119, in worker
    result = (True, func(*args, **kwds))
  File "C:\Users\ankita1268\Desktop\CRC-BP-Multi-G\main_Iter_mflip.py", line 120, in func
    polar_decoded_llr, a = polar_codes_iter_mflip.FG_decode(signal, polar_iter_num, stage_num, frozen_indexes, info_indexes, B_N, sigma, BIG_NUM, perm[perm_idx], alpha, beta, threshold, H_CRC,T)
  File "C:\Users\ankita1268\Desktop\CRC-BP-Multi-G\polar_codes_iter_mflip.py", line 203, in FG_decode
    L[:, n] = LLR_L_
TypeError: 'int' object does not support item assignment
"""
[color=#E74C3C] L[:, n] = LLR_L_
TypeError: 'int' object does not support item assignment[/color]

But this code runs if I have the last part of code as below:

   for i_flip in range(add_attempt):
      L[:, n] = LLR_L_
           decoding process function here( if fails)
           else:
           LLR_L_ = LLR_L
           if LLR_L[indexes[i_flip]] > 0:
               LLR_L_[indexes[i_flip]] = (-1) * 10
           else:
               LLR_L_[indexes[i_flip]] = 10