QRcode generator for the access local test server

qr_gen.py

"""
    QRcode generator

    usage: 
        qr_gen.py [-t] <url>

    options:
        -t   Translate localhost or loopback address to host address
"""
import qrcode
import re
import socket
from docopt import docopt

if __name__ == '__main__':
    args = docopt(__doc__)
    url = url_r = args['<url>']

    if args['-t']:
        expr = re.compile(r'^(https?://)(localhost|127\.0\.0\.1)')
        repl = r'\g<1>' + socket.gethostbyname(socket.gethostname())

        url_r = expr.sub(repl, url)

    if url != url_r:
        print('%s => %s' % (url, url_r))
    else:
        print(url)

    img = qrcode.make(url_r)
    img.show()