Terraria bytewise player unknowns diff

def compare_indexes( a, b ):
    l_a, l_b = len(a), len(b)
    if l_a > l_b:
        print( 'a is ' + str( l_a - l_b ) + 'bytes longer than b.' )
        return
    elif l_a < l_b:
        print( 'a is ' + str( l_b - l_a ) + 'bytes shorter than b.' )
        return
    else:
        boundaries = deque( [ 0, # Start of format version
                              4, # after format version
                              24, # 20 bytes of unknown is over
                              36, # after bytes for 5char name, diff, hair and hair dye
                              44, # 8 bytes of unknown is over
                              65, # after whether demon heart has been used
                              69, # 4 bytes of unknown is over
                              180, # after last social accessory
                              190, # 10 bytes of unknown is over
                              235, # after last dye
                              240, # 5 bytes of unknown is over
                              1779, # after display_moon
                              1780 # 1 unknown byte is over
                              ] )

        skip = False
        for i in range( l_a ):
            if len(boundaries) > 0 and i == boundaries[0]:   # Toggle skipping if at next boundary
                skip = not skip
                boundaries.popleft()
                #print( ('Not s' if not skip else 'S') + 'kipping from index: ' + str(i) )
            if not skip:    # Compare at index if not skipping
                a_i, b_i = a[i], b[i]
                if a_i != b_i:
                    print( 'Difference index: ' + str(i) + ': ' + str(a_i) + ': ' + str(b_i) )
            if skip and len(boundaries) == 0:   # If set to skip and never going to change that, exit loop
                print( 'Ending comparison early after index: ' + str(i) )
                break