def doc_frequency(self, fieldid, text):
        raise NotImplementedError
Bootstrap Django and initialise this module
dataset/ETHPy150Open dokipen/whoosh/src/whoosh/reading.py/IndexReader.doc_frequency--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/PyAMF-0.6.1/pyamf/tests/adapters/test_django.py/init_django