diff --git a/examples/helloworld/tf_example1/test.py b/examples/helloworld/tf_example1/test.py
index 8ba5462257b..ee20b580f4c 100644
--- a/examples/helloworld/tf_example1/test.py
+++ b/examples/helloworld/tf_example1/test.py
@@ -1,35 +1,75 @@
+"""Example: post-training quantization with neural-compressor.
+
+Simplified version that keeps tf.flags usage for consistency
+with the original script. Uses print for logging to stay minimal.
+"""
+
+from pathlib import Path
 import tensorflow as tf
 
-from neural_compressor.data import TensorflowImageRecord
-from neural_compressor.data import BilinearImagenetTransform
-from neural_compressor.data import ComposeTransform
-from neural_compressor.data import DefaultDataLoader
-from neural_compressor.quantization import fit
-from neural_compressor.config import PostTrainingQuantConfig
 from neural_compressor import Metric
+from neural_compressor.config import PostTrainingQuantConfig
+from neural_compressor.data import (
+    BilinearImagenetTransform,
+    ComposeTransform,
+    DefaultDataLoader,
+    TensorflowImageRecord,
+)
+from neural_compressor.quantization import fit
 
 flags = tf.compat.v1.flags
 FLAGS = flags.FLAGS
 
-flags.DEFINE_string('dataset_location', None, 'location of calibration dataset and evaluate dataset')
+# keep the same flag as original code
+flags.DEFINE_string(
+    "dataset_location",
+    None,
+    "location of calibration dataset and evaluate dataset",
+)
+
 
-calib_dataset = TensorflowImageRecord(root=FLAGS.dataset_location, transform= \
-        ComposeTransform(transform_list= [BilinearImagenetTransform(height=224, width=224)]))
-calib_dataloader = DefaultDataLoader(dataset=calib_dataset, batch_size=10)
+def build_dataloader(root: str, batch_size: int) -> DefaultDataLoader:
+    """Create a DefaultDataLoader for given root and batch size."""
+    transform = ComposeTransform(
+        transform_list=[BilinearImagenetTransform(height=224, width=224)]
+    )
+    dataset = TensorflowImageRecord(root=root, transform=transform)
+    return DefaultDataLoader(dataset=dataset, batch_size=batch_size)
 
-eval_dataset = TensorflowImageRecord(root=FLAGS.dataset_location, transform=ComposeTransform(transform_list= \
-        [BilinearImagenetTransform(height=224, width=224)]))
-eval_dataloader = DefaultDataLoader(dataset=eval_dataset, batch_size=1)
 
-def main():
+def main() -> None:
+    """Run post-training quantization with predefined configuration."""
+    dataset_location = FLAGS.dataset_location or "./dataset"
+    model_path = "./mobilenet_v1_1.0_224_frozen.pb"
+    calib_batch_size = 10
+    eval_batch_size = 1
+    calib_size = 20
+
+    # basic checks
+    ds_path = Path(dataset_location)
+    model_file = Path(model_path)
+
+    if not ds_path.exists():
+        raise FileNotFoundError(f"Dataset path not found: {ds_path}")
+    if not model_file.exists():
+        raise FileNotFoundError(f"Model file not found: {model_file}")
+
+    # build dataloaders
+    calib_dataloader = build_dataloader(root=str(ds_path), batch_size=calib_batch_size)
+    eval_dataloader = build_dataloader(root=str(ds_path), batch_size=eval_batch_size)
+
+    # metric and config
     top1 = Metric(name="topk", k=1)
-    config = PostTrainingQuantConfig(calibration_sampling_size=[20])
+    config = PostTrainingQuantConfig(calibration_sampling_size=[calib_size])
+
     q_model = fit(
-        model="./mobilenet_v1_1.0_224_frozen.pb",
+        model=str(model_file),
         conf=config,
         calib_dataloader=calib_dataloader,
         eval_dataloader=eval_dataloader,
-        eval_metric=top1)
+        eval_metric=top1,
+    )
+
 
 if __name__ == "__main__":
     main()