Need python3.6 compatibility

[dino99]

Artful now have python3.6 as default
(python3-defaults (3.6.1-0ubuntu1) artful; urgency=medium

  * Make Python 3.6 the default version.

 -- Michael Hudson-Doyle <email address hidden> Thu, 20 Jul 2017 13:35:04 +1200)

but some packages still have python<3.6 as dependency

sudo apt-get upgrade python3
...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 hplip : Depends: python3 (< 3.6) but 3.6.1-0ubuntu1 is to be installed
 python3-uno : Depends: python3 (< 3.6) but 3.6.1-0ubuntu1 is to be installed
 rhythmbox-plugins : Depends: python3 (< 3.6) but 3.6.1-0ubuntu1 is to be installed
E: Broken packages

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: hplip 3.17.6+repack0-2
ProcVersionSignature: Ubuntu 4.11.0-11.16-generic 4.11.10
Uname: Linux 4.11.0-11-generic x86_64
ApportVersion: 2.20.6-0ubuntu3
Architecture: amd64
CupsErrorLog:

CurrentDesktop: GNOME
Date: Thu Jul 20 13:00:54 2017
EcryptfsInUse: Yes
Lpstat: device for Photosmart-C4500: hp:/usb/Photosmart_C4500_series?serial=CN87JD4109057K
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 002: ID 046d:c062 Logitech, Inc. M-UAS144 [LS1 Laser Mouse]
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
Papersize: letter
PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/Photosmart-C4500.ppd'] failed with exit code 2: grep: /etc/cups/ppd/Photosmart-C4500.ppd: Permission denied
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.11.0-11-generic root=UUID=8a00317c-669e-447c-bc40-1e06010b49ca ro
SourcePackage: hplip
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/07/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P7.00
dmi.board.name: B150M-HDV
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP7.00:bd10/07/2016:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnB150M-HDV:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.

[dino99 (9d9)]

Rebuilding libsane has fixed the hplip problem.