bluemoon@bluemoon-laptop:~$ sudo apt-get install -f
Password:
Reading package lists... Done
Building dependency tree... Done
Correcting dependencies... Done
The following extra packages will be installed:
  python2.4-matplotlib python2.4-sip-qt3
Suggested packages:
  ipython latex
The following NEW packages will be installed:
  python2.4-matplotlib python2.4-sip-qt3
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
581 not fully installed or removed.
Need to get 0B/1754kB of archives.
After unpacking 9277kB of additional disk space will be used.
Do you want to continue [Y/n]? Y
(Reading database ... 177552 files and directories currently installed.)
Unpacking python2.4-matplotlib (from .../python2.4-matplotlib_0.82-5ubuntu1_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/python2.4-matplotlib_0.82-5ubuntu1_i386.deb (--unpack):
 trying to overwrite `/usr/lib/python2.4/site-packages/pytz/__init__.py', which is also in package python2.4-tz
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Unpacking python2.4-sip-qt3 (from .../python2.4-sip-qt3_3.10.2-1.1ubuntu1_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/python2.4-sip-qt3_3.10.2-1.1ubuntu1_i386.deb (--unpack):
 trying to overwrite `/usr/lib/python2.4/site-packages/sipconfig.py', which is also in package python2.4-sip4-qt3
Errors were encountered while processing:
 /var/cache/apt/archives/python2.4-matplotlib_0.82-5ubuntu1_i386.deb
 /var/cache/apt/archives/python2.4-sip-qt3_3.10.2-1.1ubuntu1_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)