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from typing_extensions import deprecated
import torch
# We need to keep this unused import for BC reasons
from torch.amp.grad_scaler import OptState # noqa: F401
__all__ = ["GradScaler"]
class GradScaler(torch.amp.GradScaler):
r"""
See :class:`torch.amp.GradScaler`.
``torch.cuda.amp.GradScaler(args...)`` is deprecated. Please use ``torch.amp.GradScaler("cuda", args...)`` instead.
"""
@deprecated(
"`torch.cuda.amp.GradScaler(args...)` is deprecated. "
"Please use `torch.amp.GradScaler('cuda', args...)` instead.",
category=FutureWarning,
)
def __init__(
self,
init_scale: float = 2.0**16,
growth_factor: float = 2.0,
backoff_factor: float = 0.5,
growth_interval: int = 2000,
enabled: bool = True,
) -> None:
super().__init__(
"cuda",
init_scale=init_scale,
growth_factor=growth_factor,
backoff_factor=backoff_factor,
growth_interval=growth_interval,
enabled=enabled,
)
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