Automating File & Folder Tasks

import os
from pathlib import Path
from collections import defaultdict

# Common automation tasks:

# 1. Batch rename files
def demo_rename():
    files = ["photo_001.jpg", "photo_002.jpg", "photo_003.jpg"]
    print("=== Batch Rename Demo ===")
    for i, f in enumerate(files, 1):
        new_name = f"vacation_{i:03d}{Path(f).suffix}"
        print(f"  {f} → {new_name}")

demo_rename()

# 2. Find duplicate files (by name)
def find_duplicates(files):
    seen = defaultdict(list)
    for f in files:
        name = Path(f).stem
        seen[name].append(f)
    duplicates = {k: v for k, v in seen.items() if len(v) > 1}
    return duplicates

test_files = ["doc.txt", "photo.jpg", "doc.txt", "report.pdf", "photo.jpg"]
dupes = find_duplicates(test_files)
print("\n=== Duplicate Files ===")
for name, files in dupes.items():
    print(f"  '{name}' appears {len(files)} times")

# 3. Organize by extension
def organize_plan(files):
    categories = defaultdict(list)
    for f in files:
        ext = Path(f).suffix.lower()
        categories[ext].append(f)
    return categories

mixed = ["data.csv", "photo.png", "script.py", "report.pdf", 
         "image.jpg", "app.py", "notes.txt"]
plan = organize_plan(mixed)
print("\n=== Organization Plan ===")
for ext, files in sorted(plan.items()):
    print(f"  {ext}: {', '.join(files)}")

# 4. Monitor directory size
def calc_sizes(files_with_sizes):
    total = sum(s for _, s in files_with_sizes)
    print(f"\n=== Directory Stats ===")
    print(f"  Files: {len(files_with_sizes)}")
    print(f"  Total: {total / 1024:.1f} KB")

data = [("app.py", 4096), ("data.csv", 102400), ("image.png", 51200)]
calc_sizes(data)