Reading QR codes from file fails due to "Exception: tostring() has been removed. Please call tobytes() instead."

[Karl-Philipp Richter]

Terminal output right after requesting decoding from file:

    /usr/lib/python2.7/dist-packages/PIL/Image.py:870: UserWarning: Palette images with Transparency expressed in bytes should be converted to RGBA images
      'to RGBA images')
    Traceback (most recent call last):
      File "/usr/bin/qtqr", line 540, in decodeFile
        if qr.decode():
      File "/usr/lib/python2.7/dist-packages/qrtools.py", line 181, in decode
        raw = pil.tostring()
      File "/usr/lib/python2.7/dist-packages/PIL/Image.py", line 695, in tostring
        "Please call tobytes() instead.")
    Exception: tostring() has been removed. Please call tobytes() instead.
    Traceback (most recent call last):
      File "/usr/bin/qtqr", line 540, in decodeFile
        if qr.decode():
      File "/usr/lib/python2.7/dist-packages/qrtools.py", line 181, in decode
        raw = pil.tostring()
      File "/usr/lib/python2.7/dist-packages/PIL/Image.py", line 695, in tostring
        "Please call tobytes() instead.")
    Exception: tostring() has been removed. Please call tobytes() instead.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: qtqr 1.4~bzr21-1
Uname: Linux 4.5.5-040505-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Jun 7 14:41:34 2016
InstallationDate: Installed on 2013-10-17 (963 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
PackageArchitecture: all
SourcePackage: qr-tools
UpgradeStatus: Upgraded to xenial on 2016-03-04 (94 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Egor (gluk47)]

And the fix is obvious. Go to the file '/usr/lib/python2.7/dist-packages/qrtools.py', the line 181 (as root) and replace 'tostring()' with 'tobytes()'.

Can it please be fixed?

[Nosphky (philip-jackson)]

I applied the change to qrtools.py (comment #3 above) and this solved my problem. qtqr now decodes nicely.

[Ramiro Algozino (algozino)]

This has already been fixed in the revision 23, available in the daily ppa:

http://bazaar.launchpad.net/~qr-tools-developers/qr-tools/trunk/revision/23

[Alberto Salvia Novella (es20490446e)]

@ Ramiro Algozino

You marked this bug as "fix released" for Ubuntu. But, as I just clarified by the Ubuntu Bug Master, that's only correct if the fix is already published in the development version of Ubuntu, not in a PPA.

Moreover, even if the bug was fixed in Yakkety, the bug needed to be nominated for Xenial and marked as "confirmed" for that release. Otherwise it would never get fixed there.

[Boyuan Yang (hosiet)]

Version 1.4~bzr23 migrated into Ubuntu. Fixed in Ubuntu 17.10.

[Paul White (paulw2u)]

Xenial release is no longer supported so marking Papercuts task as fixed.