package python-chardet 2.3.0-2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Dhaval Simaria]

Unable to install nmap using command sudo apt install nmap.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: python-chardet 2.3.0-2
ProcVersionSignature: Ubuntu 4.4.0-75.96-generic 4.4.59
Uname: Linux 4.4.0-75-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
Date: Sun May 7 19:34:12 2017
Dependencies: python-pkg-resources 20.7.0-1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2016-05-14 (357 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.15ubuntu0.2
SourcePackage: chardet
Title: package python-chardet 2.3.0-2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.