The post installation file /var/lib/dpkg/info/python-minimal.postinst
runs the following command:

python2.7 -m compileall /usr/share/python/ >/dev/null

Running the command manually (without the /dev/null redirect) produces
the following error for me:

Compiling 
/usr/share/python/rekall-forensic/lib/python2.7/site-packages/pexpect/async.py 
...
  File 
"/usr/share/python/rekall-forensic/lib/python2.7/site-packages/pexpect/async.py",
 line 16
    transport, pw = yield from asyncio.get_event_loop()\
                             ^
SyntaxError: invalid syntax

I removed the /usr/share/python/rekall-forensic folder and was able to
"apt install -f". Likely a different package is causing you trouble, but
try running that command for more information.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to python-defaults in Ubuntu.
https://bugs.launchpad.net/bugs/1750586

Title:
  package python-minimal 2.7.12-1~16.04 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 1

Status in python-defaults package in Ubuntu:
  Confirmed

Bug description:
  There seems to be a dependency snarl:

  python-minimal is already the newest version (2.7.12-1~16.04).
  python-minimal set to manually installed.
  You might want to run 'apt-get -f install' to correct these:
  The following packages have unmet dependencies:
   python : PreDepends: python-minimal (= 2.7.11-1) but 2.7.12-1~16.04 is to be 
installed
   python-all : Depends: python (= 2.7.12-1~16.04) but 2.7.11-1 is to be 
installed
   python-all-dev : Depends: python (= 2.7.12-1~16.04) but 2.7.11-1 is to be 
installed
                    Depends: libpython-all-dev (= 2.7.12-1~16.04) but 2.7.11-1 
is to be installed
   python-dev : Depends: python (= 2.7.12-1~16.04) but 2.7.11-1 is to be 
installed
                Depends: libpython-dev (= 2.7.12-1~16.04) but 2.7.11-1 is to be 
installed
  E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify 
a solution).

  apt-get -f install tries to set up python-minimal (2.7.12-1~16.04) and
  returns 1.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: python-minimal 2.7.12-1~16.04
  ProcVersionSignature: Ubuntu 4.4.0-109.132-generic 4.4.98
  Uname: Linux 4.4.0-109-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  Date: Tue Feb 20 08:48:01 2018
  DuplicateSignature:
   package:python-minimal:2.7.12-1~16.04
   Setting up python-minimal (2.7.12-1~16.04) ...
   dpkg: error processing package python-minimal (--configure):
    subprocess installed post-installation script returned error exit status 1
  ErrorMessage: subprocess installed post-installation script returned error 
exit status 1
  InstallationDate: Installed on 2016-10-23 (484 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.3
   apt  1.2.25
  SourcePackage: python-defaults
  Title: package python-minimal 2.7.12-1~16.04 failed to install/upgrade: 
subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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