1) Create a virtual env (recommended)

python -m venv .venv && . .venv/bin/activate # Windows: .venv\Scripts\activate

2) Install deps

pip install -r requirements.txt

3) Dry-run first (no changes)

python sort_photos_by_year.py "D:\Photos\Inbox" "D:\Photos\Sorted" --copy --dry-run

4) Do it for real (copy or move)

python sort_photos_by_year.py "D:\Photos\Inbox" "D:\Photos\Sorted" --copy

or

python sort_photos_by_year.py "D:\Photos\Inbox" "D:\Photos\Sorted" --move