Docker script `docker-compose --version` is now throwing a weird error and is complaining about a missing python module `ordered_dict`. Not sure why is this happening but previously it was working just fine. Not sure if its related but I installed `pip` for python and later installed `awscli` using the pip.

Below is the stack trace I get on running `docker-compose --version`

```
Traceback (most recent call last):
  File "/usr/bin/docker-compose", line 9, in <module>
    load_entry_point('docker-compose==1.8.0', 'console_scripts', 'docker-compose')()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 484, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2725, in load_entry_point
    return ep.load()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2343, in load
    return self.resolve()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2349, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python2.7/dist-packages/compose/cli/main.py", line 14, in <module>
    from . import errors
  File "/usr/lib/python2.7/dist-packages/compose/cli/errors.py", line 9, in <module>
    from docker.errors import APIError
  File "/usr/lib/python2.7/dist-packages/docker/__init__.py", line 20, in <module>
    from .client import Client, AutoVersionClient, from_env # flake8: noqa
  File "/usr/lib/python2.7/dist-packages/docker/client.py", line 18, in <module>
    import requests
  File "/usr/lib/python2.7/dist-packages/requests/__init__.py", line 58, in <module>
    from . import utils
  File "/usr/lib/python2.7/dist-packages/requests/utils.py", line 26, in <module>
    from .compat import parse_http_list as _parse_list_header
  File "/usr/lib/python2.7/dist-packages/requests/compat.py", line 42, in <module>
    from .packages.urllib3.packages.ordered_dict import OrderedDict
ImportError: No module named ordered_dict

```