[Bug 1779237] Re: package python3 3.6.5-3ubuntu1 failed to install/upgrade: installed python3 package post-installation script subprocess returned error exit status 4

[Steve Langasek]

> I remove the file HPLIP from usr/share/ (sudo rm -r /usr/share/hplip)
> and re-install (sh hplip-3.18.6.run)

/usr/share/hplip is a directory that is managed by the hplip-data
package in Ubuntu.  If you have installed an upstream version of hplip
from source on top of the package, we cannot guarantee this will work;
and this probably entirely explains the upgrade failure of python3.

Why have you installed hplip from source on top of Ubuntu?  Is there
some howto on the Internet that suggests this is a reasonable thing to
do?

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https://bugs.launchpad.net/bugs/1779237

Title:
  package python3 3.6.5-3ubuntu1 failed to install/upgrade: installed
  python3 package post-installation script subprocess returned error
  exit status 4

Status in python3-defaults package in Ubuntu:
  Incomplete

Bug description:
  Only Ubuntu Update

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: python3 3.6.5-3ubuntu1
  ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
  Uname: Linux 4.15.0-22-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  Date: Thu Jun 28 22:51:28 2018
  ErrorMessage: installed python3 package post-installation script subprocess returned error exit status 4
  InstallationDate: Installed on 2018-04-13 (76 days ago)
  InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
  Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
  PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2
   apt  1.6.2
  SourcePackage: python3-defaults
  Title: package python3 3.6.5-3ubuntu1 failed to install/upgrade: installed python3 package post-installation script subprocess returned error exit status 4
  UpgradeStatus: Upgraded to bionic on 2018-05-03 (56 days ago)

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