Using Python instead of Bash

[Cecil Westerhof]

I help someone that has problems reading. For this I take photo's of
text, use convert from ImageMagick to make a good contrast (original
paper is grey) and use lpr to print it a little bigger.

Normally I would implement this in Bash, but I thought it a good idea
to implement it in Python. This is my first try:
    import glob
    import subprocess

    treshold = 66
    count = 0
    for input in sorted(glob.glob('*.JPG')):
        count += 1
        output = '{0:02d}.png'.format(count)
        print('Going to convert {0} to {1}'.format(input, output))
        p = subprocess.Popen(['convert', '-threshold', '{0}%'.format(treshold), input, output])
        p.wait()
        print('Going to print {0}'.format(output))
        p = subprocess.Popen(['lpr', '-o', 'fit-to-page', '-o', 'media=A4', output])
        p.wait()

There have to be some improvements: display before printing,
possibility to change threshold, … But is this a good start, or should
I do it differently?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof