moto + raven: six issue, cannot import urllib

[amitsaha]

I tried to use moto in our code base where we also use raven (for sentry logging):

>>> from raven.utils import six
>>> 
>>> from moto import mock_s3
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/moto/__init__.py", line 8, in <module>
    from .autoscaling import mock_autoscaling  # flake8: noqa
  File "/usr/local/lib/python2.7/dist-packages/moto/autoscaling/__init__.py", line 2, in <module>
    from .models import autoscaling_backends
  File "/usr/local/lib/python2.7/dist-packages/moto/autoscaling/models.py", line 3, in <module>
    from moto.core import BaseBackend
  File "/usr/local/lib/python2.7/dist-packages/moto/core/__init__.py", line 2, in <module>
    from .models import BaseBackend  # flake8: noqa
  File "/usr/local/lib/python2.7/dist-packages/moto/core/models.py", line 8, in <module>
    from .responses import metadata_response
  File "/usr/local/lib/python2.7/dist-packages/moto/core/responses.py", line 8, in <module>
    import six.moves.urllib
ImportError: No module named urllib

This is not a moto specific issue, however, I thought I would point it here: http://stackoverflow.com/questions/34667533/weird-issue-with-python-six-cannot-import-urllib

If you have any suggestions, please let me know.

[spulec]

Why are you importing six from raven instead of import six itself?

[amitsaha]

This code simply demonstrates what raven does - which my application code calls before I import moto.

[spulec]

Ah, got it. If you just run python, can you import six.moves.urllib?

[amitsaha]

Yes. I can. A funny thing is if I import six.moves.urllib before importing raven, everything works.

[spulec]

What happens if you import Raven and then run import six.moves.urllib?

[amitsaha]

I haven't tried that. Will update on Monday from work. Thank you for working through this with me.

[amitsaha]

This is what I see:

>>> from raven.utils import six
>>> import six.moves.urllib
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named urllib
>>> 
>>> 
>>> import six
>>> 
>>> 
>>> six.moves.urllib
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/six.py", line 90, in __get__
    result = self._resolve()
  File "/usr/local/lib/python2.7/dist-packages/six.py", line 113, in _resolve
    return _import_module(self.mod)
  File "/usr/local/lib/python2.7/dist-packages/six.py", line 80, in _import_module
    __import__(name)
ImportError: No module named urllib

I should note that, the six module shipped with raven doesn't actually include the urllib support.

[mitsuhiko]

Is this python-moto from debian or did you pip install it?

[amitsaha]

Hi @mitsuhiko , thanks for the hint related to requests on the get sentry email. As i emailed there:

If you install requests-0.14.2 (which I had installed), this error easily surfaces. I upgrade requests and it doesn't happen any more. If you could share why this was happening, I would love to know.

Thanks, closing this issue now.