def get_csv_refdf(self, basename):
pref = os.path.join(self.dirpath, basename + '<STR_LIT>')<EOL>dfref = read_csv(pref, index_col=<NUM_LIT:0>, parse_dates=True, engine='<STR_LIT>')<EOL>return dfref<EOL>
Obtain the reference data from read_csv with the Python engine.

Parameters
----------

basename : str
    File base name, excluding file extension.

Returns
-------

dfref : DataFrame