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

[Saurabh Patil]

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)