package python2.7-minimal 2.7.1-1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 3

[Jens]

Binary package hint: python2.7

package python2.7-minimal 2.7.1-1 failed to install/upgrade during upgrade from ubuntu 10.10 to 11.04.

lsb_release -rd
Description: Ubuntu natty (development branch)
Release: 11.04

python2.7:
  Installed: 2.7.1-1
  Candidate: 2.7.1-1
  Version table:
 *** 2.7.1-1 0
        500 http://be.archive.ubuntu.com/ubuntu/ natty/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: python2.7-minimal 2.7.1-1
ProcVersionSignature: Ubuntu 2.6.35-23.41-generic 2.6.35.7
Uname: Linux 2.6.35-23-generic x86_64
Architecture: amd64
Date: Thu Dec 9 01:18:58 2010
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 3
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release Candidate amd64 (20100928)
SourcePackage: python2.7
Title: package python2.7-minimal 2.7.1-1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 3

[Jens (jens.timmerman)]

doing an update now gives

Setting up python2.7-minimal (2.7.1-1) ...
Linking and byte-compiling packages for runtime python2.7...
E: pycompile:240: Requested versions are not installed
dpkg: error processing python2.7-minimal (--configure):
 subprocess installed post-installation script returned error exit status 3
Errors were encountered while processing:
 python2.7-minimal
E: Sub-process /usr/bin/dpkg returned an error code (1)

[Jens (jens.timmerman)]

ok, this is totally expected due to the change from python 2.6 to 2.7

just now got the mail to hold the updates a bit..

[Murray Cumming (murrayc)]

You have marked this as invalid, but it doesn't seem to be either user error or fixed.

So what am I supposed to do when this happens? I hit this problem yesterday and today when trying to upgrade to (currently unstable) Natty.

[Jens (jens.timmerman)]

I maked this as invalid because of this mail:
https://lists.ubuntu.com/archives/ubuntu-devel-announce/2010-December/000795.html

quote: avoid bug reports about upgrade problems.

This problem was fixed last week for my by using

sudo apt-get dist-upgrade -f

(which was suggested by apt)

after this apt was working normally again.

[Mehmet (mehmeteribol)]

I cant upgrade or dist-upgrade. apt-get cant install any package now. I remove python2.7 and python2.7-minimal and try upgrade but it did not work.

[Matthias Klose (doko)]

see bug #689306, comment #9 how to unbreak the system.