codewars/books/python_black/proxy.py

import sys
import socket
import threading



# HEX_FILTER = ''.join([(len(repr(chr(i))) == 3) and chr(i) or '.' for i in range(256)])
HEX_FILTER = ''.join([chr(i) if len(repr(chr(i))) == 3 else '.' for i in range(256)])


def hexdump(src, length=16, show=True):
    if isinstance(src, bytes):
        src = src.decode()
    results = list()
    for i in range(0, len(src), length):
        word = str(src[i:i+length])

        printable = word.translate(HEX_FILTER)
        hexa = ' '.join([f'{ord(c):02X}' for c in word])
        hexwidth = length*3
        results.append(f'{i:04x} {hexa:<{hexwidth}} {printable}')
    if show:
        for line in results:
            print(line)
    else:
        return results




def main():
    # print(HEX_FILTER)
    hexdump('python rocks\n and prixies roll\n', length=8)


if __name__ == '__main__':
    main()