python -m expense_tracker.cli summary -m 2 python -m expense_tracker.cli summary -y 2026 python -m expense_tracker.cli summary -y 2026 -m 2 expense-tracker-cli/ ├── src/ │ └── expense_tracker/ │ ├── _ ...

Each chapter in the book has its own branch, which contains all the commits for that chapter. So, the state of the code in a branch is the state of the code at the end of that chapter. In other words, ...