def format(value, format_string):
    df = DateFormat(value)
    return df.format(format_string)
*data* element as an :class:`~xml.etree.ElementTree.Element`
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/utils/dateformat.py/format--crossover with--dataset/ETHPy150Open ncclient/ncclient/ncclient/operations/retrieve.py/GetReply.data_ele