[Bug 1700964] Re: package python-psycopg2 2.6.1-1build2 failed to install/upgrade: sub-processo script pre-removal instalado retornou estado de saída de erro 1

[Kai Kasurinen]

*** This bug is a duplicate of bug 1715062 ***
    https://bugs.launchpad.net/bugs/1715062

** This bug has been marked a duplicate of bug 1715062
   package python-six 1.10.0-3 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1

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Title:
  package python-psycopg2 2.6.1-1build2 failed to install/upgrade: sub-
  processo script pre-removal instalado retornou estado de saída de erro
  1

Status in python-defaults package in Ubuntu:
  New

Bug description:
  Updated from python version 2.7 to 3.5 and removed the former from the
  alternatives list.  It broke python-psycopg2 package so that I could
  not either finish installation or remove the package, and I got
  warnings every time I installed other packages through apt or updated
  apt sources, and various crashes reports on startup.

  Adding python 2.7 to alternatives again, with priority set to  2 ($
  sudo update-alternatives --install /usr/bin/python python
  /usr/bin/python2.7 2) restored normal behavior, but it took me a bit
  to understand what to do.

  Maybe there could be a better warning or error message that pointed
  the user to the right direction.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: python-psycopg2 2.6.1-1build2
  ProcVersionSignature: Ubuntu 4.4.0-81.104-generic 4.4.67
  Uname: Linux 4.4.0-81-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.6
  Architecture: amd64
  Date: Tue Jun 27 15:46:57 2017
  ErrorMessage: sub-processo script pre-removal instalado retornou estado de saída de erro 1
  InstallationDate: Installed on 2016-12-06 (203 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.2
   apt  1.2.20
  SourcePackage: psycopg2
  Title: package python-psycopg2 2.6.1-1build2 failed to install/upgrade: sub-processo script pre-removal instalado retornou estado de saída de erro 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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