package python-crypto 2.6.1-6ubuntu0.16.04.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

this error was the result of python 2.7.14 upgrade. I am still working on it.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: python-crypto 2.6.1-6ubuntu0.16.04.2
ProcVersionSignature: Ubuntu 4.10.0-42.46~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-42-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.14
Architecture: amd64
Date: Wed Dec 27 22:00:16 2017
DuplicateSignature:
 package:python-crypto:2.6.1-6ubuntu0.16.04.2
 Processing triggers for systemd (229-4ubuntu21) ...
 dpkg: error processing package python-pkg-resources (--configure):
  package is in a very bad inconsistent state; you should
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2017-11-07 (50 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.3
 apt 1.2.24
SourcePackage: python-crypto
Title: package python-crypto 2.6.1-6ubuntu0.16.04.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)