def get(self, key, default=None):
        "Returns the default value if the requested data doesn't exist"
        try:
            val = self[key]
        except KeyError:
            return default
        if val is []:
            return default
        return val
dataset/ETHPy150Open kdart/pycopia/aid/pycopia/dictlib.py/MultiValueDict.get/operator `==` -> `is`