def DPL()

in src/smclarify/bias/metrics/common.py [0:0]

• 15 lines of code
• 3 McCabe index (conditional complexity)

def DPL(feature: pd.Series, sensitive_facet_index: pd.Series, positive_label_index: pd.Series) -> float:
    require(sensitive_facet_index.dtype == bool, "sensitive_facet_index must be of type bool")
    require(positive_label_index.dtype == bool, "label_index must be of type bool")
    na = len(feature[~sensitive_facet_index])
    nd = len(feature[sensitive_facet_index])
    na_pos = len(feature[~sensitive_facet_index & positive_label_index])
    nd_pos = len(feature[sensitive_facet_index & positive_label_index])
    if na == 0:
        raise ValueError("Negative facet set is empty.")
    if nd == 0:
        raise ValueError("Facet set is empty.")
    qa = na_pos / na
    qd = nd_pos / nd
    dpl = qa - qd
    return dpl