def __set__(self, instance, value):
        if value is not None and isinstance(value, str):
            try:
                value = W3CDTF_to_datetime(value)
            except __HOLE__:
                raise ValueError("Value must be W3C datetime format")
        super(W3CDateTime, self).__set__(instance, value)
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/openpyxl-2.3.0-b2/openpyxl/workbook/properties.py/W3CDateTime.__set__