Simple hexdump made in python 3 (similiar to xxd)

hexdump.py

#! /usr/bin/python3
import sys

inf = sys.stdin.buffer

data = []
byte = ''

# Read data from file in blocks of 16 bytes
# Python >= 3.8
while (byte := inf.read(16)):
  data.append(byte)
# Python < 3.8
'''
byte = inf.read(16)
data.append(byte)
while byte:
  byte = inf.read(16)
  data.append(byte)
'''

def parse_utf(line):
  res = []
  for i in line:
    if i in range(32, 127):
      res.append(chr(i))
    else:
      res.append('.')
  return res

count = 0
for line in data:
  i = 0
  j = 2
  aux = line
  l = len(aux)
  res = []
  while i <= l:
    res.append(aux[i:j].hex())
    i += 2
    j += 2

  print("{c}: {res:<40} {s}".format(c=(hex(count)[2:]).zfill(8), res=' '.join(res), s=''.join(parse_utf(line))))

  count += 16