def __init__(self, data=None):
        if data is None:
            data = []
        elif isinstance(data, AList):
            data = data._data_
        self._data_ = data
>>> tl = AList([1, 2, 3])
dataset/ETHPy150Open petrvanblokland/Xierpa3/xierpa3/toolbox/storage/adict.py/AList.__init__