What you will learn
Create instances, store attributes and define methods.
Practise
Add validation that prevents a negative price.
Classes and data models
PRACTICE LAB
Python source · .pyRead. Edit. Run.
Experiment with the program below. Your code and input are sent to the selected compiler only when you run it.
Tab indents · Shift+Tab unindents · Esc then Tab leaves the editor · Ctrl/Cmd+Enter runs · Ctrl/Cmd+S saves a draft
Changes save automatically to your account.
Input / output example
Example inputNo input required.Expected output for the original program
Keyboard: INR 1250.00
Output will appear here.
Debugging Lab
Interactive Python Object Visualizer
Educational simulation — object identities and execution steps are illustrative.