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[Barry Warsaw <1489443@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1445949 ***
    https://bugs.launchpad.net/bugs/1445949

On Aug 27, 2015, at 01:22 PM, Muelli wrote:

>I think the duplicate status is wrong.

I agree, but then it's not a bug in python-apt.  It's really a bug caused by
our old version of pip, which doesn't natively understand PEP 440 'arbitrary
equality' clauses signified by the === marker.  Even if you change
python-apt's version number it's still possible that some other installed
package will have a nonconforming version number.

Upgrading pip to the latest version is an arduous process because of all the
bureaucracy involved (and a bit of technical prerequisites), but in any case,
with the help of the upstream maintainer, I did backport a workaround in pip
1.5.6-7 (seen in Ubuntu as 1.5.6-7ubuntu1).  You'll need wily though.

>I did a sudo apt-get install -t wily python-apt to get 1.0.0~beta3.1ubuntu1
>which is the version which is supposed to fix the problem.  However, pip
>freeze still fails.

`pip list` would also trigger the bug, but it should be fixed now, at least in
unstable and wily.  I have an ongoing task to update pip to the latest
upstream release.

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https://bugs.launchpad.net/bugs/1489443

Title:
  python-apt offends python-pip's freeze

Status in python-apt package in Ubuntu:
  New

Bug description:
  I'm trying to use pip freeze, but it fails:

  >pip freeze
  Exception:
  Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main
      status = self.run(options, args)
    File "/usr/lib/python2.7/dist-packages/pip/commands/freeze.py", line 74, in run
      req = pip.FrozenRequirement.from_dist(dist, dependency_links, find_tags=find_tags)
    File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 299, in from_dist
      assert len(specs) == 1 and specs[0][0] == '==', (dist, req, specs, dependency_links)
  AssertionError: (python-apt 0.9.3.11build1 (/usr/lib/python2.7/dist-packages), Requirement.parse('python-apt===0.9.3.11build1'), [('===', '0.9.3.11build1')], ['https://pypi.python.org/packages/source/c/certifi/certifi-1.0.1.tar.gz#md5=45f5cb94b8af9e1df0f9450a8f61b790', 'https://pypi.python.org/packages/source/w/wincertstore/wincertstore-0.2.zip#md5=ae728f2f007185648d0c7a8679b361e2'])

  
  Note that I've patched /usr/lib/python2.7/dist-packages/pip/__init__.py to show me the dist.

  It seems that pip does not like the string    python-
  apt===0.9.3.11build1

  This could be https://github.com/pypa/pip/issues/1093

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: python-apt 0.9.3.11build1
  ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2
  Uname: Linux 3.19.0-25-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.2
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Thu Aug 27 14:25:36 2015
  SourcePackage: python-apt
  UpgradeStatus: No upgrade log present (probably fresh install)

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