I'm getting this error and I can't fix it This is a code for implementing a Hamming code in Python.

def calcRedundantBits(m): # Calculate the number of redundant bits needed for a given number of data bits for i in range(m): if 2 ** i >= m + i + 1: return i

def posRedundantBits(data, r): # Determine the positions of the redundant bits in the encoded data res = "" for i in range(1, len(data) + r + 1): if i == 2 ** (i - 1) + 1: res += "0" else: res += data[i - 1] return res[::-1]

def calcParityBits(arr, r): # Calculate the parity bits for a given set of data bits for i in range(r): val = 0 for j in range(1, len(arr) + 1): if j & 2 ** i == 2 ** i: val ^= int(arr[-j]) arr = arr[:len(arr) - 2 ** i] + str(val) + arr[len(arr) - 2 ** i + 1:] return arr

def detectError(arr, r): # Detect errors in the received data res = 0 for i in range(r): val = 0 for j in range(1, len(arr) + 1): if j & 2 ** i == 2 ** i: val ^= int(arr[-j]) res += val * 10 ** i return int(str(res), 2)

# Encode the data using a Hamming code data = "1011001" r = calcRedundantBits(len(data)) arr = posRedundantBits(data, r) arr = calcParityBits(arr, r)

# Data to be transferred print("Data transferred is " + arr)

# Stimulate error in transmission by changing a bit value # 10101001110 -> 11101001110, error in 10th position. arr = "11101001110" print("Error Data is " + arr)

# Detect and correct the error correction = detectError(arr, r) if correction == 0: print("There is no error in the received message.") else: print(f"The position of error is {len(arr) - correction + 1} from the left")

THE ERROR IS

Traceback (most recent call last): File "", line 41, in File "", line 14, in posRedundantBits IndexError: string index out of range