def __init__(self, index=False, as_json=False, primary_key=False,
                 pickled=False, default=None):
        self._index = index or primary_key
        self._as_json = as_json
        self._primary_key = primary_key
        self._pickled = pickled
        self._default = default
Retrieve the list of current L{FileDescriptor} monitored for reading.
dataset/ETHPy150Open coleifer/walrus/walrus/models.py/Field.__init__--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/internet/gtk2reactor.py/Gtk2Reactor.getReaders