package python-sklearn 0.17.0-4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 126

[Prabhat Singh]

I tried to install python-sklearn using apt but it showed some error.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: python-sklearn 0.17.0-4
ProcVersionSignature: Ubuntu 4.4.0-109.132-generic 4.4.98
Uname: Linux 4.4.0-109-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
AptOrdering:
 python-sklearn-lib: Install
 python-sklearn: Install
 python-sklearn-lib: Configure
 python-sklearn: Configure
 NULL: ConfigurePending
Architecture: amd64
Date: Mon Jan 15 21:48:31 2018
DuplicateSignature:
 package:python-sklearn:0.17.0-4
 Setting up python-sklearn (0.17.0-4) ...
 /var/lib/dpkg/info/python-sklearn.postinst: 6: /var/lib/dpkg/info/python-sklearn.postinst: pycompile: Permission denied
 dpkg: error processing package python-sklearn (--configure):
  subprocess installed post-installation script returned error exit status 126
ErrorMessage: subprocess installed post-installation script returned error exit status 126
InstallationDate: Installed on 2016-08-07 (525 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.18
SourcePackage: scikit-learn
Title: package python-sklearn 0.17.0-4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 126
UpgradeStatus: No upgrade log present (probably fresh install)