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lethalbrains/__calculate_impurity_score.py

Last active August 8, 2018 06:36
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__calculate_impurity_score.py
def __calculate_impurity_score(self, data):
if data is None or data.empty: return 0
p_i, _ = data.value_counts().apply(lambda x: x/len(data)).tolist()
return p_i * (1 - p_i) * 2
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