ImportError: No module named 'commands'

[erwango]

When running west fetch, I get the following error:

from commands import CommandContextError ImportError: No module named 'commands'

Looking out on the web, i didn't found a way to install it, but ways not to use it:
yunabe/lgo#42

And according to https://bbs.archlinux.org/viewtopic.php?id=125971, "module is deprecated and should be replaced by subprocess"

[mbolivar]

@erwango thanks for the report! Actually 'commands' is an internal west module, we're just playing tricks with PYTHONPATH to import it without the 'west.commands' full qualifier. I think this is confusing and we should be importing all west module as west.xxx. Let me send a patch making that happen.

[erwango]

Ok, so questin is how I ended up with this error then.
For info, here is what I got:

$ west fetch
Traceback (most recent call last):
  File "/local/home/frq07517/.local/bin/west", line 11, in <module>
    sys.exit(main())
  File "/local/home/frq07517/.local/lib/python3.5/site-packages/bootstrap/main.py", line 206, in main
    wrap(wrap_argv)
  File "/local/home/frq07517/.local/lib/python3.5/site-packages/bootstrap/main.py", line 191, in wrap
    main_module = importlib.import_module('west.main')
  File "/usr/lib/python3.5/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 665, in exec_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
  File "/local/mcu/zephyr/tmp/zep3/west/src/west/main.py", line 19, in <module>
    from commands import CommandContextError
ImportError: No module named 'commands'

[mbolivar]

Ah, I bet this is our README's fault. Did you 'pip install west==0.2.0rc2'? Right now we are in the prerelease period for 0.2.0 so the default release on pypi -- 0.1.0 -- may no longer be working.

[erwango]

Indeed, I should be on the earlier one.
Let me clean this up and get back to you.