Borrow and Return — Tkinter Library

Runnable code for this step

This lesson explains the ideas. The matching GitHub folder is a complete desktop app you can clone and run as-is— you do not need to type every file from scratch before you try it.

Open snapshot on GitHub

fcc-tkinter-library/09-Borrow-and-Return

Run locally

git clone https://github.com/michaeldunga1/fcc-tkinter-library.git
cd fcc-tkinter-library/09-Borrow-and-Return
python3 app.py

Goal for this part

Implement checkout and return. Members borrow when copies remain, receive a due date (14 days), and return from a My loans tab.

Concepts: derived availability

Keep books.copies as owned inventory. Open loans (returned_at IS NULL) reduce availability. Do not decrement the copies column on borrow—that makes returns and audits harder.

How to run it and what you should see

As Grace, borrow an available title, see it under My loans, return it, and watch availability rise. Attempting to borrow when no copies remain should show an error.

Goal for this part

Concepts: derived availability

How to run it and what you should see

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