def get_prefix(self):
        return self._element.prefix
Given the parquet_file and csv_file representation, converts the
dataset/ETHPy150Open uwdata/termite-visualizations/web2py/gluon/contrib/pysimplesoap/simplexml.py/SimpleXMLElement.get_prefix--crossover with--dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/parquet-python/test/test_read_support.py/TestCompatibility._test_file_custom