Ubuntu
python-central package

Packages seem to be uninstallable if they have no Python-Version field.

Bug #80588 reported by Sarah Kowalik on 2007-01-19

This bug report is a duplicate of: Bug #64848: [SRU: EDGY] packaging typo - k3d does not install. Edit Remove

Affects		Status	Importance	Assigned to	Milestone
	python-central (Ubuntu)	New	Undecided	Unassigned

Bug Description

Binary package hint: python-central

(Reading database ... 164438 files and directories currently installed.)
Removing k3d ...
Traceback (most recent call last):
  File "/usr/bin/pycentral", line 1348, in ?
    main()
  File "/usr/bin/pycentral", line 1342, in main
    rv = action.run(global_options)
  File "/usr/bin/pycentral", line 932, in run
    pkg.read_version_info()
  File "/usr/bin/pycentral", line 535, in read_version_info
    raise PyCentralError, "package has no field Python-Version"
__main__.PyCentralError: package has no field Python-Version
dpkg: error processing k3d (--purge):
subprocess pre-removal script returned error exit status 1
Traceback (most recent call last):
  File "/usr/bin/pycentral", line 1348, in ?
    main()
  File "/usr/bin/pycentral", line 1342, in main
    rv = action.run(global_options)
  File "/usr/bin/pycentral", line 865, in run
    pkg.read_version_info()
  File "/usr/bin/pycentral", line 535, in read_version_info
    raise PyCentralError, "package has no field Python-Version"
__main__.PyCentralError: package has no field Python-Version
dpkg: error while cleaning up:
subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
k3d

Revision history for this message

Paul Williams (pwill) wrote on 2007-02-05:

Confirmed.
I am having trouble upgrading python2.5, and it spits out this same error.

Revision history for this message

Luke Vukasin (l-vukasin) wrote on 2007-03-04:

I just had the exact same problem here.
I think i found the cause.
by doing:
"dpkg-query -s k3d"
i get the field:
"Python-Versions: current" (amongst all the other fields)

and when i inspect the "/usr/bin/pycentral" file on in the function where the last error raised (line 535) it looks to me as though its searching for "Python-Version:" (without the 's')

so in the pycentral file i added in the 's' and the k3d packaged was removed successfuly. I'm still only very new to linux, and not sure if its fault of pycentral, or if its because of k3d's description, but thats how i found to fix the problem

Revision history for this message

Luke Vukasin (l-vukasin) wrote on 2007-03-04:

Ooops sorry, posted bit too quickly.

The problem was in a bug report for the k3d package as well and someone has released a patch file for it.
its at the address:
https://bugs.launchpad.net/ubuntu/+source/k3d/+bug/64848

Revision history for this message

nardis_Miles1 (edwardsa) wrote on 2007-04-29:

Thanks for this post. I was updating to feisty and k3d could be neither installed nor removed. I did alter pycentral and that allowed installation of k3d.