dataset_size.py

# dataset_size.py
import os, sys, math, hashlib
from pathlib import Path

def human(n):
    units = ["B","KB","MB","GB","TB","PB"]
    if n == 0: return "0 B"
    k = int(math.floor(math.log(n, 1024)))
    return f"{n/1024**k:.2f} {units[k]}"

def dir_size(path: Path) -> int:
    total = 0
    for p in path.rglob("*"):
        if p.is_file():
            try:
                total += p.stat().st_size
            except Exception:
                pass
    return total

def main():
    if len(sys.argv) < 2:
        print("Usage: python dataset_size.py <root_dir>")
        sys.exit(1)
    root = Path(sys.argv[1]).resolve()
    if not root.exists() or not root.is_dir():
        print(f"Not a directory: {root}")
        sys.exit(1)

    # one level down summary
    subs = [p for p in root.iterdir() if p.is_dir()]
    rows = []
    grand = 0
    for s in subs:
        sz = dir_size(s)
        grand += sz
        rows.append((s.name, sz))
    # include loose files at root
    root_files = sum((p.stat().st_size for p in root.iterdir() if p.is_file()), 0)
    grand += root_files
    if root_files:
        rows.append(("(files in root)", root_files))

    rows.sort(key=lambda x: x[1], reverse=True)

    print(f"\nDataset: {root}")
    print("-"*70)
    for name, sz in rows:
        print(f"{name:<30} {human(sz):>12}")
    print("-"*70)
    print(f"{'TOTAL':<30} {human(grand):>12}")

if __name__ == "__main__":
    main()