Comment 89 for bug 192992

ppc64 GNU/Linux (ps3):
After I upgraded python-central to version 0.5.50ubuntu3 some packages which failed to upgrade due to python-central's previous version upgraded now fine.
But some new issues:
 Preparing to replace mythbuntu-control-centre 0.20-0ubuntu1 (using .../mythbuntu-control-centre_0.21-0ubuntu1_all.deb) ...
Traceback (most recent call last):
  File "/usr/bin/pycentral", line 1593, in <module>
    main()
  File "/usr/bin/pycentral", line 1587, in main
    rv = action.run(global_options)
  File "/usr/bin/pycentral", line 1145, in run
    pkg = DebPackage('package', self.args[0], oldstyle=False)
  File "/usr/bin/pycentral", line 295, in __init__
    self.read_pyfiles()
  File "/usr/bin/pycentral", line 315, in read_pyfiles
    lines = self.read_preinst_pkgconfig()
  File "/usr/bin/pycentral", line 403, in read_preinst_pkgconfig
    self.pkgconfig.readfp(cStringIO.StringIO(buffer.getvalue()))
AttributeError: 'NoneType' object has no attribute 'getvalue'
dpkg: warning - old pre-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
dpkg: ... it looks like that went OK.
Traceback (most recent call last):
  File "/usr/bin/pycentral", line 1593, in <module>
    main()
  File "/usr/bin/pycentral", line 1587, in main
    rv = action.run(global_options)
  File "/usr/bin/pycentral", line 1080, in run
    old_pkg = DebPackage('package', self.args[0], oldstyle=False)
  File "/usr/bin/pycentral", line 295, in __init__
    self.read_pyfiles()
  File "/usr/bin/pycentral", line 315, in read_pyfiles
    lines = self.read_preinst_pkgconfig()
  File "/usr/bin/pycentral", line 403, in read_preinst_pkgconfig
    self.pkgconfig.readfp(cStringIO.StringIO(buffer.getvalue()))
AttributeError: 'NoneType' object has no attribute 'getvalue'
dpkg: error processing /var/cache/apt/archives/mythbuntu-control-centre_0.21-0ubuntu1_all.deb (--unpack):
 subprocess pre-installation script returned error exit status 1
Traceback (most recent call last):
  File "/usr/bin/pycentral", line 1593, in <module>
    main()
  File "/usr/bin/pycentral", line 1587, in main
    rv = action.run(global_options)
  File "/usr/bin/pycentral", line 1015, in run
    pkg = DebPackage('package', self.args[0], oldstyle=False)
  File "/usr/bin/pycentral", line 295, in __init__
    self.read_pyfiles()
  File "/usr/bin/pycentral", line 315, in read_pyfiles
    lines = self.read_preinst_pkgconfig()
  File "/usr/bin/pycentral", line 403, in read_preinst_pkgconfig
    self.pkgconfig.readfp(cStringIO.StringIO(buffer.getvalue()))
AttributeError: 'NoneType' object has no attribute 'getvalue'
dpkg: error while cleaning up:
 subprocess post-installation script returned error exit status 1