package python3 3.4.0-0ubuntu2 failed to install/upgrade: pre-dependency problem - not installing python3

[Mickael Brier]

.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: python3 3.4.0-0ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Sun Aug 7 10:04:59 2016
ErrorMessage: pre-dependency problem - not installing python3
InstallationDate: Installed on 2015-08-10 (362 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: python3-defaults
Title: package python3 3.4.0-0ubuntu2 failed to install/upgrade: pre-dependency problem - not installing python3
UpgradeStatus: Upgraded to xenial on 2016-08-07 (0 days ago)

[Launchpad Janitor (janitor)]

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

[Matthias Klose (doko)]

this looks like a corrupted file system. Please reinstall the package.

Setting up python3.5-minimal (3.5.2-2~16.01) ...
  File "/usr/lib/python3.5/calendar.py", line 382
    �ssclasses = ["mon", "tue", "wed", "thu", "fri", "sat", "sun"]
             ^
SyntaxError: invalid character in identifier

dpkg: error processing package python3.5-minimal (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of python3-minimal:
 python3-minimal depends on python3.5-minimal (>= 3.5.1-2~); however:
  Package python3.5-minimal is not configured yet.