Fails with ImportError: cannot import name IncompleteRead

[drmikecrowe]

The following error occurs:

TASK: [anarcher.docker-registry | Add docker-py python module (for ansible)] *** 
failed: [zdockreg] => {"cmd": "/usr/bin/pip install docker-py", "failed": true}
msg: 
:stderr: Traceback (most recent call last):
  File "/usr/bin/pip", line 9, in <module>
    load_entry_point('pip==1.5.4', 'console_scripts', 'pip')()
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 351, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2363, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2088, in load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])
  File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 11, in <module>
    from pip.vcs import git, mercurial, subversion, bazaar  # noqa
  File "/usr/lib/python2.7/dist-packages/pip/vcs/mercurial.py", line 9, in <module>
    from pip.download import path_to_url
  File "/usr/lib/python2.7/dist-packages/pip/download.py", line 25, in <module>
    from requests.compat import IncompleteRead
ImportError: cannot import name IncompleteRead

To fix, add this in install_docker_debian.yml:

- name: Add python-pip package (for ansible)
  apt: pkg=python-pip state=present

# New task:
- name: Make sure pip upgraded
  command: easy_install -U pip

(I supposed installing with easy_install is an option too, but this seems to work)