def __init__(self, quote_char='"', interpolation='?', field_overrides=None,
                 op_overrides=None):
        self.quote_char = quote_char
        self.interpolation = interpolation
        self._field_map = merge_dict(self.field_map, field_overrides or {})
        self._op_map = merge_dict(self.op_map, op_overrides or {})
        self._parse_map = self.get_parse_map()
        self._unknown_types = set(['param'])
dataset/ETHPy150Open coleifer/peewee/peewee.py/QueryCompiler.__init__/original