py_xxd.py

#!/usr/local/bin/python3
from binascii import hexlify

output = ""
with open("a.exe", "rb") as file:
    i = 0
    j = 0
    k = 0
    output_1 = ""
    output_2 = ""
    a = file.read(1)
    while a != b'':
        i += 1
        j += 1
        k += 1
        byte = hexlify(a).decode("ascii")
        output_1 = output_1 + byte
        if k == 2:
            output_1 = output_1 + " "
            k = 0

        dec_value = int(hexlify(a), 16)
        if dec_value >= 32 and dec_value <= 126:
            asc = a.decode("utf-8")
        else:
            asc = "."
        output_2 += asc

        if i == 16:
            print("{:07x}: {} {}".format(j - 16, output_1, output_2))
            i = 0
            output_1 = ""
            output_2 = ""
        a = file.read(1)
file.close()