Iterating on a QR service Source: http://zacharyvoase.com/2013/03/06/qr-codify/ Install into ~/Library/Services using Automator

qr_service.py

import sys
import subprocess
import tempfile
import urllib

with tempfile.NamedTemporaryFile(mode='w', suffix='.png') as f:
    try:
        subprocess.check_call('qrencode -V'.split())
    except OSError:
        print "Rendering QR Code using Google Charts API"
        text = sys.stdin.read()
        chart_url_template = ('https://chart.googleapis.com/chart?'
                              'cht=qr&chs=300x300&chl={data}&chld=H|0')
        chart_url = chart_url_template.format(data=urllib.quote(text))

        subprocess.check_call(['curl', '-L', chart_url],
                              stdout=f, stderr=sys.stderr)
    else:
        print "Rendering QR Code using qrencode"
        subprocess.check_call('qrencode -o - -l L -s 15 --'.split(),
                              stdin=sys.stdin, stdout=f, stderr=sys.stderr)

    subprocess.check_call(['qlmanage', '-p', f.name])