[Bug 1664780] Re: all py3 programms throw same error after update

[Beavis]

http://stackoverflow.com/questions/42184792/pip-does-not-work-after-
upgrade-to-ubuntu-16-10/42248012#42248012

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https://bugs.launchpad.net/bugs/1664780

Title:
  all py3 programms throw same error after update

Status in python-setuptools package in Ubuntu:
  New

Bug description:
  Hi,

  I am on Ubuntu and I upgraded my pip3 packages and that broke my
  system. Now every p3 program does this:

      from pkg_resources import load_entry_point
    File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2976, in <module>
      @_call_aside
    File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2962, in _call_aside
      f(*args, **kwargs)
    File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3004, in _initialize_master_working_set
      dist.activate(replace=False)
    File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2535, in activate
      declare_namespace(pkg)
    File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2109, in declare_namespace
      _handle_ns(packageName, path_item)
    File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2058, in _handle_ns
      _rebuild_mod_path(path, packageName, module)
    File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2078, in _rebuild_mod_path
      orig_path.sort(key=position_in_sys_path)
  AttributeError: '_NamespacePath' object has no attribute 'sort'

  I cleaned up and reinstalled all python3 related packages, what to do
  next?

  Thanks a lot.

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