Raspbian apt-get dependency error with Python?

Question

I've ran the following command on Raspbian:

$ sudo apt-get upgrade

But now when I try to do:

$ sudo apt-get install -f

or any other apt-get command, I got this error and I can't get rid of it:

The following packages have unmet dependencies: 
idle:  Depends: python (= 2.7.3-4) 
but 2.7.3-4 + deb7u1 must be installed 
python: Depends: python-minimal (= 2.7.3-4 + deb7u1) 
but 2.7.3-4 is to be installed
E: Unmet dependencies.
Try 'apt-get-f install' with no packages   

Running:

$ apt-get install -f

I get this error:

Unpacking python-minimal 2.7.3-4
(using ... / python-minimal_2.7.3 deb7u1_all.deb-4 +)
...segmentation fault 
dpkg: warning: subprocess old pre-removal script returned error exit status 139 
dpkg: attempt to run the script from the new package instead 
...segmentation fault
dpkg: error processing / 
var/cache/apt/archives/python-minimal_2.7.3-4deb7u1_all.deb 
+ (- unpack): subprocess new pre-removal script
returned error exit status 139 
Errors were encountered while processing: 
/ var/cache/apt/archives/python-minimal_2.7.3-4 +deb7u1_all.d   

Any suggestions?

Answer 1

First, try apt-get install -f. From the man page:

-f, --fix-broken

Fix; attempt to correct a system with broken dependencies in place. This option, when used with install/remove, can omit any packages to permit APT to deduce a likely solution. If packages are specified, these have to completely correct the problem. The option is sometimes necessary when running APT for the first time; APT itself does not allow broken package dependencies to exist on a system. It is possible that a system's dependency structure can be so corrupt as to require manual intervention (which usually means using dselect(1) or dpkg --remove to eliminate some of the offending packages).

If that does not work out, try python --version; you should get Python 2.7.3. If instead you get another segmentation fault or other errors, try apt-get install -f --reinstall python.