$ sudo apt-get install hpijs hplip
Reading package lists... Done
Building dependency tree
Reading state information... Done
hpijs is already the newest version.
hpijs set to manually installed.
The following packages were automatically installed and are no longer required:
  planner libgsf-gnome-1-114 libmagick++10 gnome-office gnumeric-common
  gnome-themes-extras libgoffice-0-6-common gnome-backgrounds libgoffice-0-6
  gnome-core gnumeric inkscape
Use 'apt-get autoremove' to remove them.
Suggested packages:
  hplip-doc kdeprint gtklp xpp
Recommended packages:
  hpijs-ppds hplip-gui
The following packages will be upgraded:
  hplip
1 upgraded, 0 newly installed, 0 to remove and 388 not upgraded.
45 not fully installed or removed.
Need to get 0B/309kB of archives.
After this operation, 0B of additional disk space will be used.
(Reading database ... 343071 files and directories currently installed.)
Preparing to replace hplip 2.8.2-0ubuntu8 (using .../hplip_2.8.2-0ubuntu8.1_i386.deb) ...
/usr/sbin/update-python-modules:125: DeprecationWarning: raising a string exception is deprecated
  raise "Trying to overwrite %s which is already provided by %s"%(os.path.join(dir,file),otherdir)
Traceback (most recent call last):
  File "/usr/sbin/update-python-modules", line 315, in <module>
    process(basedir,install_modules([pyver]))
  File "/usr/sbin/update-python-modules", line 160, in process
    func(basedir, dir, file)
  File "/usr/sbin/update-python-modules", line 125, in install_modules_func
    raise "Trying to overwrite %s which is already provided by %s"%(os.path.join(dir,file),otherdir)
Trying to overwrite gtk-2.0 which is already provided by /usr/share/python-support/python-gtk2
dpkg: warning - old pre-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
/usr/sbin/update-python-modules:125: DeprecationWarning: raising a string exception is deprecated
  raise "Trying to overwrite %s which is already provided by %s"%(os.path.join(dir,file),otherdir)
Traceback (most recent call last):
  File "/usr/sbin/update-python-modules", line 315, in <module>
    process(basedir,install_modules([pyver]))
  File "/usr/sbin/update-python-modules", line 160, in process
    func(basedir, dir, file)
  File "/usr/sbin/update-python-modules", line 125, in install_modules_func
    raise "Trying to overwrite %s which is already provided by %s"%(os.path.join(dir,file),otherdir)
Trying to overwrite gtk-2.0 which is already provided by /usr/share/python-support/python-gtk2
dpkg: error processing /var/cache/apt/archives/hplip_2.8.2-0ubuntu8.1_i386.deb (--unpack):
 subprocess new pre-removal script returned error exit status 1
/usr/sbin/update-python-modules:125: DeprecationWarning: raising a string exception is deprecated
  raise "Trying to overwrite %s which is already provided by %s"%(os.path.join(dir,file),otherdir)
Traceback (most recent call last):
  File "/usr/sbin/update-python-modules", line 315, in <module>
    process(basedir,install_modules([pyver]))
  File "/usr/sbin/update-python-modules", line 160, in process
    func(basedir, dir, file)
  File "/usr/sbin/update-python-modules", line 125, in install_modules_func
    raise "Trying to overwrite %s which is already provided by %s"%(os.path.join(dir,file),otherdir)
Trying to overwrite gtk-2.0 which is already provided by /usr/share/python-support/python-gtk2
dpkg: error while cleaning up:
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/hplip_2.8.2-0ubuntu8.1_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)