MISSION 020 – QR code

16 lutego 2018 czang Bez kategorii 0

Today we have very friendly mission – qr codes and simple calculations.
More details here: link

Okay – how I started?
I always start the same way – from my mobile device…., I opened website, and url from description, there was a QR code, so I saved it to my device, but my Iphone app could’nt read from this file. So… I got second phone (Android) and scanned QR code from Iphone display, and sent it by whatsapp:

OK – how to calculate this? Value by value or with math rules?
I’ve tried both

way, but…. it wasn’t work, cos….

  

If you have bad tools, your result will be the same….

In Python it looks differen:

So… I’ve got next QR code, next calculation, and again, and again, and again….

Libraries:

pip install pyzbar
pip install Pillow

Code:

from pyzbar.pyzbar import decode
from PIL import Image
import requests
 
url="http://gynvael.coldwind.pl/qrmaze/"
fileName = "e:\python\\"
fn = "start"
ext = '.png'
 
while fn != '':
    req = requests.get(''.join([url, fn, ext]))
    file = open(''.join([fileName, fn, ext]), 'wb')
    for chunk in req.iter_content(100000):
        file.write(chunk)
    file.close()
 
    qrData = decode(Image.open(''.join([fileName, fn, ext])))
    item = qrData[0][0].decode("utf-8")
    fn = ''
    if "Calc value, add .png, repeat: " in item:
        x = item[30:].split(',')
        print(x)
        value = x[0].__str__()
        for a in x[1:]:
            tmp = ''.join([value, a])
            value = eval(tmp).__str__()
        print(value)
        fn = ''.join(value)
    else:
        print(item)

Flag:

Yeah! – 1001 Dalmatians 🙂