Module Import Errors

[vladimir-v-diaz]

Numerous modules raise import errors.
Example:

>>> import warehouse.utils
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/vlad/projects/warehouse/warehouse/utils.py", line 26, in <module>
    from warehouse import helpers
  File "/home/vlad/projects/warehouse/warehouse/helpers.py", line 23, in <module>
    import warehouse.application
  File "/home/vlad/projects/warehouse/warehouse/application.py", line 49, in <module>
    from warehouse.packaging.search import ProjectMapping
  File "/home/vlad/projects/warehouse/warehouse/packaging/search.py", line 17, in <module>
    from warehouse.search.indexes import BaseMapping
  File "/home/vlad/projects/warehouse/warehouse/search/indexes.py", line 23, in <module>
    from warehouse.utils import AttributeDict
ImportError: cannot import name AttributeDict

Should Warehouse import modules instead of module members? Importing modules might help avoid resolving classes & functions at import-time, and raising import errors like in this circular import example.

[dstufft]

Sorry for not getting back to you! I've had a busy couple of months. I would prefer not to try to "trick" the import system by import modules instead of module members. I think people should be free to use whichever makes the most sense at the time.

As to the exact issue here, PR #206 will solve that particular circular import and that's how I'd prefer to handle this going into the future, by fixing the circular imports where they happen.