Recent install on Mac unusable due to Python ImportError

[jan-grimo]

A recent install (without conda) on Mac OSX 10.11.2 was unusable due to

$ python manage.py migrate
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 353, in execute_from_command_line
    utility.execute()
  File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 327, in execute
    django.setup()
  File "/Library/Python/2.7/site-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/Library/Python/2.7/site-packages/django/apps/registry.py", line 108, in populate
    app_config.import_models(all_models)
  File "/Library/Python/2.7/site-packages/django/apps/config.py", line 202, in import_models
    self.models_module = import_module(models_module_name)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/Library/Python/2.7/site-packages/django_rdkit-0.0.4-py2.7.egg/django_rdkit/models/__init__.py", line 8, in <module>
    from django_rdkit.models.fields import *
  File "/Library/Python/2.7/site-packages/django_rdkit-0.0.4-py2.7.egg/django_rdkit/models/fields.py", line 10, in <module>
    from rdkit.DataStructs import ExplicitBitVect, SparseIntVect
ImportError: cannot import name SparseIntVect

In django_rdkit/models/fields.py, SparseIntVect is unused, so removing the import and then reinstalling w/ $ python setup.py install fixed it. SparseBitVect exists though, maybe that was the intention?

[rvianello]

Thanks a lot for the bug report @jargonzombies

The import statement referencing SparseIntVect must be a leftover from an early attempt at supporting direct I/O for the SfpField. As you noted it's unused and I will remove it from the code.

(a SparseIntVect module was indeed available from rdkit.DataStructs, but it had been obsoleted by the C++ implementation and it was therefore removed, resulting in this regression).