[Bug 1765471] Re: package python-qt4 4.11.4+dfsg-1build4 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 127

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** Tags removed: need-duplicate-check

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Title:
  package python-qt4 4.11.4+dfsg-1build4 failed to install/upgrade:
  subprocess installed pre-removal script returned error exit status 127

Status in python-qt4 package in Ubuntu:
  New

Bug description:
  Also not able to open other applications like Deluge.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: python-qt4 4.11.4+dfsg-1build4
  ProcVersionSignature: Ubuntu 4.13.0-38.43~16.04.1-generic 4.13.16
  Uname: Linux 4.13.0-38-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.16
  Architecture: amd64
  Date: Thu Apr 19 17:44:49 2018
  DuplicateSignature:
   package:python-qt4:4.11.4+dfsg-1build4
   Removing python-qt4 (4.11.4+dfsg-1build4) ...
   /var/lib/dpkg/info/python-qt4.prerm: 6: /var/lib/dpkg/info/python-qt4.prerm: pyclean: not found
   dpkg: error processing package python-qt4 (--remove):
    subprocess installed pre-removal script returned error exit status 127
  ErrorMessage: subprocess installed pre-removal script returned error exit status 127
  InstallationDate: Installed on 2017-03-11 (403 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.4
   apt  1.2.26
  SourcePackage: python-qt4
  Title: package python-qt4 4.11.4+dfsg-1build4 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 127
  UpgradeStatus: No upgrade log present (probably fresh install)

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