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0558aa4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | # Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from lightning.pytorch.callbacks import Callback as PTLCallback
class BaseCallback(PTLCallback):
"""Base callback ABC for NeMo lifecycle hooks (extends PTL callback).
Implementers may override any subset of the following methods. All are
optional no-op defaults to keep implementations lightweight.
"""
# App lifecycle
def on_app_start(self, *args, **kwargs) -> None:
"""Called when the application starts."""
pass
def on_app_end(self, *args, **kwargs) -> None:
"""Called when the application ends."""
pass
# Model lifecycle
def on_model_init_start(self, *args, **kwargs) -> None:
"""Called when model initialization starts."""
pass
def on_model_init_end(self, *args, **kwargs) -> None:
"""Called when model initialization ends."""
pass
# Dataloader lifecycle
def on_dataloader_init_start(self, *args, **kwargs) -> None:
"""Called when dataloader initialization starts."""
pass
def on_dataloader_init_end(self, *args, **kwargs) -> None:
"""Called when dataloader initialization ends."""
pass
# Optimizer lifecycle
def on_optimizer_init_start(self, *args, **kwargs) -> None:
"""Called when optimizer initialization starts."""
pass
def on_optimizer_init_end(self, *args, **kwargs) -> None:
"""Called when optimizer initialization ends."""
pass
# Checkpoint lifecycle
def on_load_checkpoint_start(self, *args, **kwargs) -> None:
"""Called when checkpoint loading starts."""
pass
def on_load_checkpoint_end(self, *args, **kwargs) -> None:
"""Called when checkpoint loading ends."""
pass
def on_save_checkpoint_start(self, *args, **kwargs) -> None:
"""Called when checkpoint saving starts."""
pass
def on_save_checkpoint_end(self, *args, **kwargs) -> None:
"""Called when checkpoint saving ends."""
pass
def on_save_checkpoint_success(self, *args, **kwargs) -> None:
"""Called when checkpoint saving succeeds."""
pass
# Configuration update
def update_config(self, *args, **kwargs) -> None:
"""Update callback-specific configuration after initialization."""
pass
__all__ = ["BaseCallback"]
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