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
:param bool index: Use this field as an index. Indexed
dataset/ETHPy150Open coleifer/walrus/walrus/models.py/Field.__init__