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Revert "Fix mypy typing errors in pytorch_lightning/strategies/single_tpu.py" #13544

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Revert "Fix mypy typing errors in pytorch_lightning/strategies/single_tpu.py" #13544

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1 change: 1 addition & 0 deletions pyproject.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,7 @@ module = [
"pytorch_lightning.strategies.parallel",
"pytorch_lightning.strategies.sharded",
"pytorch_lightning.strategies.sharded_spawn",
"pytorch_lightning.strategies.single_tpu",
"pytorch_lightning.strategies.tpu_spawn",
"pytorch_lightning.strategies.strategy",
"pytorch_lightning.profilers.advanced",
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11 changes: 9 additions & 2 deletions src/pytorch_lightning/strategies/single_tpu.py
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Expand Up @@ -19,6 +19,7 @@
from pytorch_lightning.plugins.precision import PrecisionPlugin
from pytorch_lightning.strategies.single_device import SingleDeviceStrategy
from pytorch_lightning.utilities import _TPU_AVAILABLE, find_shared_parameters, set_shared_parameters
from pytorch_lightning.utilities.model_helpers import is_overridden

if _TPU_AVAILABLE:
import torch_xla.core.xla_model as xm
Expand Down Expand Up @@ -54,10 +55,13 @@ def is_distributed(self) -> bool:
return False

def setup(self, trainer: "pl.Trainer") -> None:
assert self.model, "self.model must be set before find_shared_parameters(self.model)"
shared_params = find_shared_parameters(self.model)
self.model_to_device()
set_shared_parameters(self.model, shared_params)
if is_overridden("on_post_move_to_device", self.lightning_module):
self.model.on_post_move_to_device()
else:
set_shared_parameters(self.model, shared_params)

super().setup(trainer)

if self.debug:
Expand All @@ -66,6 +70,9 @@ def setup(self, trainer: "pl.Trainer") -> None:
self.tpu_local_core_rank = xm.get_local_ordinal()
self.tpu_global_core_rank = xm.get_ordinal()

def model_to_device(self) -> None:
self.model.to(self.root_device)

@classmethod
def register_strategies(cls, strategy_registry: Dict) -> None:
strategy_registry.register(
Expand Down