[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

[Claudia Enk de Aguiar]

** Description changed:

- Installing Django with PostgreSQL as per instructions at
- https://docs.djangoproject.com/en/1.11/ref/databases/#postgresql-notes ,
- but instead of pip I used apt.  Afterwards I installed with pip and all
- went well for PostgreSQL.  But it broke apt so that now I cannot either
- finish installation or remove the package, and I get warnings every time
- I update apt sources.
+ Updated from python version 2.7 to 3.5 and removed the former from the
+ alternatives list.  It broke apt so that I could not either finish
+ installation or remove the package, and I got warnings every time I
+ installed other packages 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
+  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)

** Description changed:

  Updated from python version 2.7 to 3.5 and removed the former from the
- alternatives list.  It broke apt so that I could not either finish
- installation or remove the package, and I got warnings every time I
- installed other packages or updated apt sources, and various crashes
- reports on startup.
+ 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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https://bugs.launchpad.net/bugs/1700964

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 psycopg2 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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