Sixel Graphics

>>> sixel2str = lambda i : '\n'.join(['■' if (((i-0x3F) >> j) & 1) else '□' for j in range(6)])
>>> sixels2str = lambda il : '\n'.join([' '.join(l) for l in zip(*[[c for c in sixel2str(i) if c != '\n'] for i in il])])
>>> print(sixel2str(0x74))
■
□
■
□
■
■

# Brian Kernighan's algo.
def count_bits(n):
    count = 0
    while n:
        n &= (n-1)
        count += 1

    return count

countbits = lambda n : (count := 0, (while n: (n &= (n-1)), count += 1), count)[-1]

for i, c in enumerate(range(ord('?'), ord('?')+64)):
    print(f"|`{bin(i).replace('0b','').rjust(6, '0')}`|`{chr(c)}`|`{hex(c).upper().replace('X','x')}`|")