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Reassemble File Parts into Original File Bytes in Python

Read sorted part files from a directory and concatenate their bytes into the original file.

import os
import sys
from pathlib import Path

def reassemble_parts(parts_dir: Path, output_path: Path) -> int:
    """
    Reassemble file parts into the original file.

    Args:
        parts_dir: Directory containing the part files
        output_path: Path where the reassembled file will be written

    Returns:
…

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