Script for generating test pages for line printers (dot-matrix) for sake of charset identification

gentestpage.py

#!/usr/bin/env python3
# generate test page for printer
import os

a = b''
for c in range(32,256):
    a +=bytes([c])

t = []
for i in range(0,16):
    t.append('x'+hex(i)[-1:])
hdr = '     ' + '  '.join(t) + '  \r\n'
os.write(1, bytes(hdr, 'utf-8'))

b = a
os.write(1, b'')
os.write(1, b'   ' + b'---'.join([b'+'] * 17)+b'\r\n')
s = int(0x20 / 0x10)
while len(b) > 0:
    t=b[:16]
    b=b[16:]
    line = []
    for c in t:
        line.append(bytes([c]))
    os.write(1, bytes(hex(s)[-1:]+'x ','utf-8'))
    os.write(1, b'| '+b' | '.join(line)+b' |')
    os.write(1,b'\r\n')
    os.write(1, b'   ' + b'---'.join([b'+'] * 17)+b'\r\n')
    s += 1
os.write(1, b'\x0c')