ImportError: No module named __future__

[RichardJECooke]

I installed the latest version of docker-compose on my Ubuntu VM using Linux Brew (Homebrew) version 1.1.5.

rje@ubuntu16vm:~/projects/wp$ brew list docker-compose
/home/rje/.linuxbrew/Cellar/docker-compose/1.9.0/bin/docker-compose
/home/rje/.linuxbrew/Cellar/docker-compose/1.9.0/etc/bash_completion.d/docker-compose
/home/rje/.linuxbrew/Cellar/docker-compose/1.9.0/libexec/bin/ (17 files)
/home/rje/.linuxbrew/Cellar/docker-compose/1.9.0/libexec/include/python2.7
/home/rje/.linuxbrew/Cellar/docker-compose/1.9.0/libexec/lib/ (761 files)
/home/rje/.linuxbrew/Cellar/docker-compose/1.9.0/libexec/pip-selfcheck.json
/home/rje/.linuxbrew/Cellar/docker-compose/1.9.0/share/zsh/site-functions/_docker-compose

When trying to run any command, e.g. docker-compose start I now get this error:

rje@ubuntu16vm:~/projects/wp$ docker-compose up
Traceback (most recent call last):
  File "/home/rje/.linuxbrew/bin/docker-compose", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/home/rje/.linuxbrew/Cellar/docker-compose/1.9.0/libexec/lib/python2.7/site-packages/pkg_resources/__init__.py", line 18, in <module>
    from __future__ import absolute_import
ImportError: No module named __future__

[shin-]

Sorry, we don't support *brew as an install method - it's proven to be riddled with issues like this one that are out of our control. Please see our install docs for the recommended packages.

[rdlester]

As a follow-up for future searchers - I ran into this issue b/c I tried to install docker-compose via the default Ubuntu apt repo, which installs an old version, before trying brew. The two things somehow conflict with one another. Uninstalling the apt packages fixed things.