bytes.py

#!/usr/bin/env python3

badbytes = b'\x00\x0a\x0d\x0f\x14\x15\x5c\x2f\x3a\xff'
print(f'badbytes raw = {badbytes}')

print('individual bad bytes as hex = ', end='')
[print(hex(x), end=' ') for x in badbytes]
print()

# Declare block explicitly as bytes:
block  = b'\xfe\x5a\x05\x3c'

# Using 'big' endianness here to ensure the bytes stay in the provided order.
block_dec = int.from_bytes(block, 'big')
block_hex = hex(block_dec)
print(f'Provided block raw = {block} as a number = {block_dec} or as hex = {block_hex}')

first_byte = block[0]
print(f'first_byte = {block[0]} and as hex: {hex(block[0])}')
# The int() is required as '/' returns a 'float'
print(f'Half of first byte: {block[0] / 2} and as hex: {hex(int(block[0]/2))}')