def save(addr, data, **kward):
    """dp.save('file.xlsx', [1,2,3,4]) -> save dataset into file
        more info on help(dp.DataSet.save)
    """
    from .core import DataSet
    if not isinstance(data, DataSet):
        data = DataSet(data, sheet=kward.get('sheet', 'sheet0'))
    data.save(addr, **kward)
