'Document' object has no attribute 'findall'

After upgrading ubuntu 13.10 to 14.04. All packages that I am trying to install is getting the following error:

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/install.py", line 278, in run
  requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle) 
File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1177, in prepare_files 
  url = finder.find_requirement(req_to_install, upgrade=self.upgrade) 
File "/usr/lib/python2.7/dist-packages/pip/index.py", line 256, in find_requirement
  page_versions.extend(self._package_versions(page.links, req.name.lower())) 
File "/usr/lib/python2.7/dist-packages/pip/index.py", line 432, in _package_versions 
  for link in self._sort_links(links): 
File "/usr/lib/python2.7/dist-packages/pip/index.py", line 422, in _sort_links 
  for link in links: 
File "/usr/lib/python2.7/dist-packages/pip/index.py", line 769, in links 
  for anchor in self.parsed.findall(".//a"):
AttributeError: 'Document' object has no attribute 'findall'

Storing debug log for failure in /root/.pip/pip.log

[dstufft]

Ah I see.

So pip itself bundles some software, html5lib being one of those, on various Linux distros they unbundle that software and cause pip to import it normally instead of using it’s own bundled copy.

What this means is that if you install an incompatible version of one of pip’s dependencies into the global Python, then you’ll break pip because pip will import that and attempt to use that instead of the correct one installed by apt-get.

[kuroyuki]

Seems the issue was fixed in the latest Pip version but apt-get has old one. I installed pip from pypa.io wget https://bootstrap.pypa.io/get-pip.py python get-pip.py And updated to latest version with : sudo pip install --upgrade pip Now I able to install packages w/o problems.