58 lines
2.5 KiB
Python
58 lines
2.5 KiB
Python
"""
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This script is designed to facilitate the creation of a subset of an existing dataset by selecting a specific number of frames from the original dataset.
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This subset can then be used for running quick unit tests.
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The script takes an input directory containing the original dataset and an output directory where the subset of the dataset will be saved.
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Additionally, the number of frames to include in the subset can be specified.
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The script ensures that the subset is a representative sample of the original dataset by copying the specified number of frames and retaining the structure and format of the data.
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Usage:
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Run the script with the following command, specifying the path to the input data directory,
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the path to the output data directory, and optionally the number of frames to include in the subset dataset:
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`python tests/scripts/mock_dataset.py --in-data-dir path/to/input_data --out-data-dir path/to/output_data`
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Example:
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`python tests/scripts/mock_dataset.py --in-data-dir data/pusht --out-data-dir tests/data/pusht`
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"""
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import argparse
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import shutil
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from tensordict import TensorDict
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from pathlib import Path
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def mock_dataset(in_data_dir, out_data_dir, num_frames):
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in_data_dir = Path(in_data_dir)
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out_data_dir = Path(out_data_dir)
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# load full dataset as a tensor dict
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in_td_data = TensorDict.load_memmap(in_data_dir / "replay_buffer")
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# use 1 frame to know the specification of the dataset
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# and copy it over `n` frames in the test artifact directory
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out_td_data = in_td_data[0].expand(num_frames).memmap_like(out_data_dir / "replay_buffer")
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# copy the first `n` frames so that we have real data
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out_td_data[:num_frames] = in_td_data[:num_frames].clone()
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# make sure everything has been properly written
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out_td_data.lock_()
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# copy the full statistics of dataset since it's pretty small
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in_stats_path = in_data_dir / "stats.pth"
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out_stats_path = out_data_dir / "stats.pth"
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shutil.copy(in_stats_path, out_stats_path)
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description="Create a dataset with a subset of frames for quick testing.")
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parser.add_argument("--in-data-dir", type=str, help="Path to input data")
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parser.add_argument("--out-data-dir", type=str, help="Path to save the output data")
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parser.add_argument("--num-frames", type=int, default=50, help="Number of frames to copy over")
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args = parser.parse_args()
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mock_dataset(args.in_data_dir, args.out_data_dir, args.num_frames) |