授業で即興で書いた平均情報量を求めるやつです

average_information_content.py

import math


def amount_of_information(expectation_value: float, probability: float) -> float:
    retval = expectation_value * math.log2(1.0/probability)
    return retval


events = {"sunny": 0.40, "cloudy": 0.30, "rainy": 0.30}

print(sum([amount_of_information(event, event) for event in events.values()]))