yum fails to start (due to missing import cElementTree which is available)

[sadfub]

If I install yum, it refuses to work:

 root@service-lappi:/usr/lib/python2.5/site-packages# aptitude install yum
 Paketlisten werden gelesen... Fertig
 Abhängigkeitsbaum wird aufgebaut
 Reading state information... Fertig
 Lese erweiterte Statusinformationen
 Initialisiere Paketstatus... Fertig
 Erzeuge Tag-Datenbank... Fertig
 Die folgenden NEUEN Pakete werden zusätzlich automatisch installiert:
   python-celementtree python-urlgrabber
 Die folgenden NEUEN Pakete werden zusätzlich installiert:
   python-celementtree python-urlgrabber yum
 0 Pakete aktualisiert, 3 zusätzlich installiert, 0 werden entfernt und 0 nicht aktualisiert.
 Muss 0B/282kB an Archiven herunterladen. Nach dem Entpacken werden 1352kB zusätzlich belegt sein.
 Wollen Sie fortsetzen? [Y/n/?] Y
 Schreibe erweiterte Statusinformationen... Fertig
 Wähle vormals abgewähltes Paket python-celementtree.
 (Lese Datenbank ... 114517 Dateien und Verzeichnisse sind derzeit installiert.)
 Entpacke python-celementtree (aus .../python-celementtree_1.0.5-9_i386.deb) ...
 Wähle vormals abgewähltes Paket python-urlgrabber.
 Entpacke python-urlgrabber (aus .../python-urlgrabber_3.1.0-3_all.deb) ...
 Wähle vormals abgewähltes Paket yum.
 Entpacke yum (aus .../archives/yum_2.4.0-3.1_all.deb) ...
 Richte python-celementtree ein (1.0.5-9) ...
 Richte python-urlgrabber ein (3.1.0-3) ...

 Richte yum ein (2.4.0-3.1) ...
 /var/lib/python-support/python2.5/yum/__init__.py:1129: Warning: 'with' will become a reserved keyword in Python 2.6
 /var/lib/python-support/python2.5/yum/depsolve.py:73: Warning: 'with' will become a reserved keyword in Python 2.6
 /var/lib/python-support/python2.5/yum/repos.py:236: Warning: 'with' will become a reserved keyword in Python 2.6
 /var/lib/python-support/python2.5/yum/repos.py:260: Warning: 'with' will become a reserved keyword in Python 2.6
 /var/lib/python-support/python2.5/yum/repos.py:263: Warning: 'with' will become a reserved keyword in Python 2.6
 /usr/share/yum-cli/cli.py:614: Warning: 'with' will become a reserved keyword in Python 2.6
 /usr/share/yum-cli/cli.py:615: Warning: 'with' will become a reserved keyword in Python 2.6
 /usr/share/yum-cli/cli.py:616: Warning: 'with' will become a reserved keyword in Python 2.6

 Paketlisten werden gelesen... Fertig
 Abhängigkeitsbaum wird aufgebaut
 Reading state information... Fertig
 Lese erweiterte Statusinformationen
 Initialisiere Paketstatus... Fertig
 Schreibe erweiterte Statusinformationen... Fertig
 Erzeuge Tag-Datenbank... Fertig
 root@service-lappi:/usr/lib/python2.5/site-packages# yum
 There was a problem importing one of the Python modules
 required to run yum. The error leading to this problem was:

   No module named cElementTree

 Please install a package which provides this module, or
 verify that the module is installed correctly.

 It's possible that the above module doesn't match the
 current version of Python, which is:
 2.5.1 (r251:54863, Mar 7 2008, 04:10:12)
 [GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)]

 If you cannot solve this problem yourself, please send this
 message to <email address hidden>.

Since there is allready a cElementTree in python2.5:

 root@service-lappi:/usr/lib/python2.5/site-packages# dpkg -L python2.5 | grep -i celement
 /usr/lib/python2.5/xml/etree/cElementTree.py

I tried this:

 root@service-lappi:/usr/lib/python2.5/site-packages# PYTHONPATH=$PATHONPATH:/usr/lib/python2.5/xml/etree/ yum
 Traceback (most recent call last):
   File "/usr/bin/yum", line 27, in <module>
     yummain.main(sys.argv[1:])
   File "/usr/share/yum-cli/yummain.py", line 75, in main
     base.getOptionsConfig(args)
   File "/usr/share/yum-cli/cli.py", line 170, in getOptionsConfig
     self.doConfigSetup(fn=opts.conffile, root=root)
   File "/var/lib/python-support/python2.5/yum/__init__.py", line 83, in doConfigSetup
     self.getReposFromConfig()
   File "/var/lib/python-support/python2.5/yum/__init__.py", line 116, in getReposFromConfig
     cfg, sections = config.parseDotRepo(fn)
   File "/var/lib/python-support/python2.5/yum/Errors.py", line 45, in __init__
     YumBaseError.__init__(self)
   File "/var/lib/python-support/python2.5/yum/Errors.py", line 25, in __init__
     self.args = args
 TypeError: 'NoneType' object is not iterable
 root@service-lappi:/usr/lib/python2.5/site-packages#

root@service-lappi:/usr/lib/python2.5/site-packages# uname -a
Linux service-lappi 2.6.22-14-generic #1 SMP Tue Feb 12 07:42:25 UTC 2008 i686 GNU/Linux
root@service-lappi:/usr/lib/python2.5/site-packages# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=7.10
DISTRIB_CODENAME=gutsy
DISTRIB_DESCRIPTION="Ubuntu 7.10"

[Ralph Janke (txwikinger)]

I can confirm this on hardy