1 from django.conf import settings

     2 from django.core.exceptions import ImproperlyConfigured

     3 from django.utils.importlib import import_module

     4 

     5 

     6 def get_storage(import_path):

     7     """

     8     Imports the message storage class described by import_path, where

     9     import_path is the full Python path to the class.

    10     """

    11     try:

    12         dot = import_path.rindex('.')

    13     except ValueError:

    14         raise ImproperlyConfigured("%s isn't a Python path." % import_path)

    15     module, classname = import_path[:dot], import_path[dot + 1:]

    16     try:

    17         mod = import_module(module)

    18     except ImportError, e:

    19         raise ImproperlyConfigured('Error importing module %s: "%s"' %

    20                                    (module, e))

    21     try:

    22         return getattr(mod, classname)

    23     except AttributeError:

    24         raise ImproperlyConfigured('Module "%s" does not define a "%s" '

    25                                    'class.' % (module, classname))

    26 

    27 

    28 # Callable with the same interface as the storage classes i.e.  accepts a

    29 # 'request' object.  It is wrapped in a lambda to stop 'settings' being used at

    30 # the module level

    31 default_storage = lambda request: get_storage(settings.MESSAGE_STORAGE)(request)