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"""
Contains various utility functions for PyTorch model training and saving.
"""
import torch
from pathlib import Path
def save_model(model: torch.nn.Module,
target_dir: str,
model_name: str):
"""Saves a PyTorch model to a target directory.
Args:
model: A target PyTorch model to save.
target_dir: A directory for saving the model to.
model_name: A filename for the saved model. Should include
either ".pth" or ".pt" as the file extension.
Example usage:
save_model(model=model,
target_dir="models",
model_name="model_name.pth")
"""
# Create target directory
target_dir_path = Path(target_dir)
target_dir_path.mkdir(parents=True,
exist_ok=True)
# Create model save path
assert model_name.endswith(".pth") or model_name.endswith(".pt"), "model_name should end with '.pt' or '.pth'"
model_save_path = target_dir_path / model_name
# Save the model state_dict()
print(f"[INFO] Saving model to: {model_save_path}")
torch.save(obj=model.state_dict(),
f=model_save_path)
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