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"""For backward compatibility, we need the class definitions to deserialize."""
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class LossScaler:
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def __init__(self, scale=1):
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self.cur_scale = scale
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class DynamicLossScaler:
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def __init__(self,
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init_scale=2**32,
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scale_factor=2.,
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scale_window=1000,
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min_scale=1,
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delayed_shift=1,
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consecutive_hysteresis=False):
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self.cur_scale = init_scale
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self.cur_iter = 0
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self.last_overflow_iter = -1
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self.scale_factor = scale_factor
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self.scale_window = scale_window
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self.min_scale = min_scale
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self.delayed_shift = delayed_shift
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self.cur_hysteresis = delayed_shift
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self.consecutive_hysteresis = consecutive_hysteresis
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