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33 lines
1.1 KiB
Python
33 lines
1.1 KiB
Python
from django.core.exceptions import ImproperlyConfigured
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# Python 2.7 has an importlib with import_module; for older Pythons,
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# Django's bundled copy provides it.
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try:
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from importlib import import_module
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except ImportError:
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from django.utils.importlib import import_module
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def get_backend(path):
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"""
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Return an instance of a registration backend, given the dotted
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Python import path (as a string) to the backend class.
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If the backend cannot be located (e.g., because no such module
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exists, or because the module does not contain a class of the
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appropriate name), ``django.core.exceptions.ImproperlyConfigured``
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is raised.
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"""
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i = path.rfind('.')
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module, attr = path[:i], path[i+1:]
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try:
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mod = import_module(module)
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except ImportError, e:
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raise ImproperlyConfigured('Error loading registration backend %s: "%s"' % (module, e))
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try:
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backend_class = getattr(mod, attr)
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except AttributeError:
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raise ImproperlyConfigured('Module "%s" does not define a registration backend named "%s"' % (module, attr))
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return backend_class()
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