Created
July 7, 2021 17:36
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Use a context manager to average over several method calls
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| from contextlib import contextmanager | |
| class Optimizer: | |
| def __init__(self, weight: int): | |
| self.weight = weight | |
| def step(self, num): | |
| num = self.calculate(num) | |
| return self.apply(num) | |
| def calculate(self, num: int): | |
| return num - self.weight | |
| def apply(self, num: int): | |
| self.weight = num % 10 | |
| return num | |
| @contextmanager | |
| def average(opt: Optimizer): | |
| storage = [] | |
| def apply(num): | |
| storage.append(num) | |
| return num | |
| old_apply = opt.apply | |
| opt.apply = apply | |
| try: | |
| yield opt | |
| finally: | |
| opt.apply = old_apply | |
| avg = sum(storage) / len(storage) | |
| opt.apply(avg) | |
| optimizer = Optimizer(3) | |
| for _ in range(4): | |
| with average(optimizer): | |
| for _ in range(3): | |
| print(optimizer.step(7)) |
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