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AssertionError: Attempted unscale_ but _scale is None. This may indicate your script did not use scaler.scale(loss or outputs) earlier in the iteration.

使用Accelerator引发的错误,在Debug时重点关注以下两处:

(1)

accelerator = Accelerator(fp16=True)

需要修改为:

accelerator = Accelerator(fp16=False)

(2)

loss.backword()

需要修改为:

accelerator.backward(loss) 

本文标签: AttemptedAssertionErrorScale