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fix attribute access in LightningModule.toggle_optimizer #6513

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Merged
merged 1 commit into from
Mar 15, 2021
Merged

fix attribute access in LightningModule.toggle_optimizer #6513

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3 changes: 2 additions & 1 deletion pytorch_lightning/core/lightning.py
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Original file line number Diff line number Diff line change
Expand Up @@ -105,6 +105,7 @@ def __init__(self, *args, **kwargs):
self._current_hook_fx_name = None
self._current_dataloader_idx = None
self._automatic_optimization: bool = True
self._param_requires_grad_state = dict()

def optimizers(self, use_pl_optimizer: bool = True) -> Union[Optimizer, List[Optimizer], List[LightningOptimizer]]:
if use_pl_optimizer:
Expand Down Expand Up @@ -1311,7 +1312,7 @@ def untoggle_optimizer(self, optimizer_idx: int):
if param in self._param_requires_grad_state:
param.requires_grad = self._param_requires_grad_state[param]
# save memory
del self._param_requires_grad_state
self._param_requires_grad_state = dict()

def optimizer_step(
self,
Expand Down