bug fix of python

here's the program:

bytes = "" message = ""

for i, line in enumerate(file): startIndex = line.index('(') endIndex = line.index(')')

co = line[startIndex:endIndex+1] # (-1.35, 2.30) coordinates = line[startIndex+1:endIndex] # -1.35, 2.30 comma = coordinates.index(',') iVoltage = coordinates[0:comma] iv = float(iVoltage) qVoltage = coordinates[comma+2:] qv = float(qVoltage) if iv >= 0 and iv <= 2 and qv >= 0 and qv <= 2: point = "1101" if iv >= 2 and iv <= 4 and qv >= 0 and qv <= 2: point = "1001" if iv >= 0 and iv <= 2 and qv >= 2 and qv <= 4: point = "1100" if iv >= 2 and iv <= 4 and qv >= 2 and qv <= 4: point = "1000" if iv >= 0 and iv <= 2 and qv <= 0 and qv >= -2: point = "1111" if iv >= 2 and iv <= 4 and qv <= 0 and qv >= -2: point = "1011" if iv >= 0 and iv <= 2 and qv <= -2 and qv >= -4: point = "1110" if iv >= 2 and iv <= 4 and qv <= -2 and qv >= -4: point = "1010" if iv >= -4 and iv <= -2 and qv >= 0 and qv <= 2: point = "0001" if iv >= -2 and iv <= 0 and qv >= 0 and qv <= 2: point = "0101" if iv >= -4 and iv <= -2 and qv >= 2 and qv <= 4: point = "0000" if iv >= -2 and iv <= 0 and qv >= 2 and qv <= 4: point = "0100" if iv >= -4 and iv <= -2 and qv >= -2 and qv <= 0: point = "0011" if iv >= -2 and iv <= 0 and qv >= -2 and qv <= 0: point = "0111" if iv >= -4 and iv <= -2 and qv >= -4 and qv <= -2: point = "0010" if iv >= -2 and iv <= 0 and qv >= -4 and qv <= -2: point = "0110"

bytes = bytes + str(point) if count%2 == 0 : n = int(bytes, 2) letter = binascii.unhexlify('%x' %n) #letter = n.to_bytes((n.bit_length() + 7) // 8, 'big').decode() # for Python 3.2+ print(co + " decodes as " + point + " - together, " + bytes + " gives \"" + letter + "\" ") bytes = "" message = message + letter else : print(co + " decodes as " + bytes) count += 1

print("Decoded message with symbol errors included: " + message) and the nipple.txt:

Nibble 0: (-0.78, 2.38) Nibble 1: (-2.56, -3.35) Nibble 2: (-0.90, -3.25) Nibble 3: (3.28, 0.84) Nibble 4: (-0.84, -3.08) Nibble 5: (-3.10, -1.50) Nibble 6: (-0.92, -2.87) Nibble 7: (-1.17, 1.07) Nibble 8: (-2.92, -3.14) Nibble 9: (-2.97, 3.51) Nibble 10: (-0.91, -2.71) Nibble 11: (3.19, 1.37) Nibble 12: (-1.11, -0.97) Nibble 13: (-3.10, -0.80) Nibble 14: (-2.82, -2.83) Nibble 15: (-2.55, 3.36) Nibble 16: (-0.80, -2.88) Nibble 17: (0.89, 3.16) Nibble 18: (-0.99, -3.51) Nibble 19: (-1.22, 1.30) Nibble 20: (-1.16, -0.86) Nibble 21: (-3.19, -2.01) Nibble 22: (-0.58, -1.42) Nibble 23: (-2.91, -0.80) Nibble 24: (-2.87, -2.76) Nibble 25: (-2.72, 2.91) Nibble 26: (-1.31, -3.36) Nibble 27: (-1.46, 0.84) Nibble 28: (-1.09, -0.87) Nibble 29: (3.53, 3.05) Nibble 30: (-1.29, -0.99) Nibble 31: (-2.91, 2.86) Nibble 32: (-1.42, -2.77) Nibble 33: (-0.41, 0.98) Nibble 34: (-1.09, -2.74) Nibble 35: (1.06, -2.88) Nibble 36: (-1.21, -1.03) Nibble 37: (-2.86, -1.03) Nibble 38: (-1.19, -2.61) Nibble 39: (2.97, 0.94) Nibble 40: (-0.51, -1.20) Nibble 41: (-1.00, -3.00) Nibble 42: (-1.00, -3.57) Nibble 43: (-1.30, 1.40) Nibble 44: (-3.48, -3.16) Nibble 45: (-2.89, 1.96) Nibble 46: (-0.64, -1.16) Nibble 47: (-0.76, 3.01) Nibble 48: (-0.59, -3.60) Nibble 49: (2.97, 3.11) Nibble 50: (-1.17, -2.70) Nibble 51: (-2.60, 1.00) Nibble 52: (-0.86, -2.66) Nibble 53: (0.64, -3.22) Nibble 54: (-2.93, -3.24) Nibble 55: (-2.71, 2.84) Nibble 56: (-0.80, -3.20) Nibble 57: (-3.31, -0.66) Nibble 58: (-0.65, -1.10) Nibble 59: (-1.10, 1.15) Nibble 60: (-0.83, -0.95) Nibble 61: (-2.79, -0.73) Nibble 62: (-1.54, -1.14) Nibble 63: (-1.07, 3.17) Nibble 64: (-1.39, -3.29) Nibble 65: (-3.15, 1.00) Nibble 66: (-0.88, -1.42) Nibble 67: (-3.11, -3.26) Nibble 68: (-1.46, -3.17) Nibble 69: (-0.93, 3.32) Nibble 70: (-3.01, -3.32) Nibble 71: (-3.30, 2.34) Nibble 72: (-0.73, -1.35) Nibble 73: (-3.00, 1.67) Nibble 74: (-0.92, -2.98) Nibble 75: (2.47, 1.22) Nibble 76: (-0.93, -2.66) Nibble 77: (-0.85, 0.93) Nibble 78: (-2.65, -2.80) Nibble 79: (-3.52, 2.65) Nibble 80: (-1.37, -3.07) Nibble 81: (2.72, 1.23) Nibble 82: (-0.82, -2.74) Nibble 83: (0.84, -3.04) Nibble 84: (-3.36, -3.30) Nibble 85: (-3.06, 2.64) Nibble 86: (-1.31, 3.16) Nibble 87: (-2.80, -3.27) Nibble 88: (-0.61, -1.46) Nibble 89: (-3.18, -3.04) Nibble 90: (-0.72, -3.03) Nibble 91: (2.77, 1.39) Nibble 92: (-0.83, -0.75) Nibble 93: (-1.09, 3.47) Nibble 94: (-0.94, -3.23) Nibble 95: (3.33, 1.28) Nibble 96: (-0.72, -1.00) Nibble 97: (-3.08, -1.07) Nibble 98: (-1.23, -2.78) Nibble 99: (2.84, 1.79) Nibble 100: (-2.63, -3.08) Nibble 101: (-3.35, 3.24) Nibble 102: (-0.92, -3.32) Nibble 103: (-2.86, -1.05) Nibble 104: (-0.94, -0.54) Nibble 105: (-0.95, 1.08) Nibble 106: (-1.02, -2.96) Nibble 107: (2.66, 1.44) Nibble 108: (-1.38, -0.48) Nibble 109: (-2.92, -1.05) Nibble 110: (-0.78, -2.78) Nibble 111: (2.52, 0.95) Nibble 112: (-1.15, -3.21) Nibble 113: (1.32, -3.06) Nibble 114: (-1.04, -2.75) Nibble 115: (-0.93, 1.52)

The program is actually read the content of txt files and decode a 16QAM signal to get the explained message,but it outputs the error message:

print(co + " decodes as " + point + " - together, " + bytes + " gives \"" + letter + "\" ") TypeError: Can't convert 'bytes' object to str implicitly

and unfortunately I can't fix it.