Python script to understand working with bits in byte arrays.

bits_in_bytes_visualization.py

import math

byte = "|------|"
display_length = 10
bit_i=16
byte_i_a = math.floor(bit_i/8)
byte_i_b = math.ceil(bit_i/8)
print("bit_i:",bit_i)
print("byte_i",byte_i_a, byte_i_b)

print(" "+" "*max(0,bit_i)+"bit-v")
display = list(byte*display_length)

display[bit_i] = "+"
print(" "*5+"".join(display))
indexes = " "*5
for i in range(display_length):
    indexes+=f"{i}{' '*7}"
print(indexes)

print(" "*max(0,byte_i_a)*8+"byte-^")
print(" "*max(0,byte_i_b)*8+"byte-^")