How to Generate an Inventory Report of All Files in Python

import os
import csv
from pathlib import Path
from datetime import datetime

def generate_inventory_report(root_dir: str = "/", output_file: str = "inventory_report.csv"):
    headers = ["File Path", "Size (bytes)", "Last Modified", "File Type"]
    rows = []
    start_time = datetime.now()
    
    for dirpath, dirnames, filenames in os.walk(Path.home()):
        for filename in filenames:
            full_path = Path(dirpath) / filename
            try:
                stats = full_path.stat()
                rows.append([
                    str(full_path),
                    stats.st_size,
                    datetime.fromtimestamp(stats.st_mtime).isoformat(),
                    full_path.suffix.lower() if full_path.suffix else "no extension"
                ])
            except (OSError, PermissionError):
                continue
    
    with open(output_file, "w", newline="", encoding="utf-8") as f:
        writer = csv.writer(f)
        writer.writerow(headers)
        writer.writerows(rows)
    
    elapsed = (datetime.now() - start_time).total_seconds()
    print(f"Report generated: {output_file}")
    print(f"Files processed: {len(rows)}")
    print(f"Time elapsed: {elapsed:.2f} seconds")

if __name__ == "__main__":
    generate_inventory_report()