def create_calc_zscore_udf(result_formatter):
return analytic(input_type=[dt.double],
output_type=dt.double)(_format_udf_return_type(
calc_zscore, result_formatter))
def create_demean_struct_udf(result_formatter):
return analytic(
input_type=[dt.double, dt.double],
output_type=dt.Struct(['demean', 'demean_weight'],
[dt.double, dt.double]),
)(_format_struct_udf_return_type(demean_struct, result_formatter))