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Just a message for those that are having trouble with from qrtools import QR or import qrtools; qrtools.QR()

I am using windows (py 3.5.0) and I got it to work by using:

from qrtools.qrtools import QR

As opposed to what the installation docs say.

Also; there seems to be a problem with the package 'zbar' as I cannot install it on my Windows machine but that's a problem with the zbar package.

nowadays the function "decode" only with param of filename,
Please consider overload the decode function with the param of raw buff.

It looks like zbar is a dependency of this project but I can't seem to pip install zbar with python version 3.8.5.

There are a lot of posts suggesting you cannot use zbar with Python 3. Is it possible to change dependencies so that qrtools can work with Python 3?

I was trying to get this library and its dependencies running on windows (unfortunately I had no choice) and I had to modify qrtools.py so that it imported from pillow by default.

Originally:

try:
    import Image
except:
    from PIL import Image

Changed To:

try:
    from PIL import Image
except:
    import Image

I had to do this because although "Image" could be imported without error it did not function as expected and caused qrtools to throw error when used. The image sub module of pillow, however, works perfectly. What is the reason for only using pillow as a fall back? Why not make pillow the default?

I am having a problem in creating 'MECARD' due to a lack of proper docs so can you please share a simple code snippet on how to make it.
Thank You
I am trying like this but unable to do it.
qr.add_data("MECARD: [('N','Tazim'),('tel','6206430455')];")

Got this problem when trying to use qrtools with up-to-date Pillow package (http://python-pillow.github.io/)

Traceback:

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/usr/lib/python2.7/dist-packages/qrtools.py:181: in decode
    raw = pil.tostring()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <PIL.Image.Image image mode=L size=128x128 at 0x7F1FAF783ED0>, args = ()
kw = {}

    def tostring(self, *args, **kw):
        raise Exception("tostring() has been removed. " +
>                       "Please call tobytes() instead.")
E       Exception: tostring() has been removed. Please call tobytes() instead.

Here's PIL function definition: https://github.com/python-pillow/Pillow/blob/master/PIL/Image.py#L698

Here's my Pillow version:

$ pip show pillow 

---
Metadata-Version: 2.0
Name: Pillow
Version: 3.1.1
Summary: Python Imaging Library (Fork)
Home-page: http://python-pillow.github.io/
Author: Alex Clark (Fork Author)
Author-email: [email protected]
Installer: pip
License: Standard PIL License
Location: /usr/local/lib/python2.7/dist-packages

It works with Pillow v.2.9.0

This works:

This fails (NULL):

Hello,

This QR code appears to be wrongfully decoded by qrtools:

It contains the url "https://qrwm.org/Q34189?pk_campaign=transdev&pk_kwd=Q209101", but qrtools wrongfully decodes it as the text "41" :

import qrtools

qr = qrtools.QR()
qr.decode("test.png")
print(qr.data)
print(qr.data_type)
print(qr.data_to_string())

returns

41
text
b'\xef\xbb\xbf41'

Context: I have generated ~500 similar QR codes through https://qrwm.org for being printed and displayed on bus stops and so I made a small script using qrtools and a regex to check if everything is ok. This is the only one that returns an error. At first I thought I did something wrong with this particular QR code, but if I scan it with my phone or an online decoder like https://zxing.org/, it returns the URL, so I think the problem is with this library.

I installed and run the example as instructed on your Read me file; it gives "Segmentation fault" for any simple QR code png file. What do you suggest?

Traceback (most recent call last):
  File "/usr/bin/qtqr", line 837, in decodeWebcam
    if qr.data_decode[qr.data_type](qr.data) == 'NULL':
  File "/usr/lib/python3.9/site-packages/qrtools.py", line 110, in <lambda>
    'wifi' : lambda data: re.findall(u"WIFI:S:(.*);T:(.*);P:(.*);[H:]+(.*);", data, re.IGNORECASE)[0],
IndexError: list index out of range

This bug keeps qtqr failing when scanning WIFI qr codes generated by FritzBox. Attached a PNG of the failing QR Code. Its content is:

WIFI:S:WifiName;T:WPA;P:605234075537023465159873240561365314585632096534;;

$ qtqr --version
QtQR version 2.0

$ zbarcam --version
0.23.1

Looks to, as if "[H:]+(.)" may be empty (missing "H:"), but regEx does not match in that case. Changing "[H:]+(.)" to "[H:](.)" helped in my case, Will create a pull request on GitHub :)

Originally reported here: https://bugs.launchpad.net/qr-tools/+bug/1810167