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Enhance input validation in sampling script #47

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Enhance input validation in sampling script #47

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7 changes: 7 additions & 0 deletions examples/sampling.py
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,7 @@
from gemma import transformer as transformer_lib

import sentencepiece as spm
import os

_PATH_CHECKPOINT = flags.DEFINE_string(
"path_checkpoint", None, required=True, help="Path to checkpoint."
Expand Down Expand Up @@ -69,6 +70,11 @@ def _load_and_sample(
total_generation_steps: int,
) -> None:
"""Loads and samples a string from a checkpoint."""
if not os.path.isfile(path_checkpoint):
raise ValueError(f"Checkpoint file not found: {path_checkpoint}")
if not os.path.isfile(path_tokenizer):
raise ValueError(f"Tokenizer file not found: {path_tokenizer}")

print(f"Loading the parameters from {path_checkpoint}")
parameters = params_lib.load_and_format_params(path_checkpoint)
print("Parameters loaded.")
Expand Down Expand Up @@ -110,3 +116,4 @@ def main(argv: Sequence[str]) -> None:

if __name__ == "__main__":
app.run(main)