def get_cache(backend, **kwargs):
    """
    Function to load a cache backend dynamically. This is flexible by design
    to allow different use cases:

    To load a backend with the old URI-based notation::

        cache = get_cache('locmem://')

    To load a backend that is pre-defined in the settings::

        cache = get_cache('default')

    To load a backend with its dotted import path,
    including arbitrary options::

        cache = get_cache('django.core.cache.backends.memcached.MemcachedCache', **{
            'LOCATION': '127.0.0.1:11211', 'TIMEOUT': 30,
        })

    """
    try:
        if '://' in backend:
            # for backwards compatibility
            backend, location, params = parse_backend_uri(backend)
            if backend in BACKENDS:
                backend = 'django.core.cache.backends.%s' % BACKENDS[backend]
            params.update(kwargs)
            mod = importlib.import_module(backend)
            backend_cls = mod.CacheClass
        else:
            backend, location, params = parse_backend_conf(backend, **kwargs)
            mod_path, cls_name = backend.rsplit('.', 1)
            mod = importlib.import_module(mod_path)
            backend_cls = getattr(mod, cls_name)
    except (__HOLE__, ImportError), e:
        raise InvalidCacheBackendError(
            "Could not find backend '%s': %s" % (backend, e))
    cache = backend_cls(location, params)
    # Some caches -- python-memcached in particular -- need to do a cleanup at the
    # end of a request cycle. If the cache provides a close() method, wire it up
    # here.
    if hasattr(cache, 'close'):
        signals.request_finished.connect(cache.close)
    return cache
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/core/cache/__init__.py/get_cache