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23 lines
674 B
23 lines
674 B
from typing import Optional
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class EMAValue(object):
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def __init__(self, init_value: Optional[float] = None, decay_factor: float = 0.999) -> None:
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super().__init__()
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self._value = init_value
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self._decay_factor = decay_factor
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@property
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def value(self) -> Optional[float]:
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return self._value
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def update(self, value: float) -> None:
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if self._value is None:
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self._value = value
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else:
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self._value = self._decay_factor * self._value + (1 - self._decay_factor) * value
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def update_with_return(self, value: float) -> Optional[float]:
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self.update(value)
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return self._value
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