Python Classroom notes 17/Apr/2026

Add more features to todo list

• We dont support completed, we just remove the items

• We dont track times

• To do this we need to store

  • id
  • task
  • planned start time
  • planned end time
  • Expected start time
  • Expected end time
  • category
  • completed

Version 1: Using JSON

• JSON (JavaScript Object Notation) is a file format which uses key value or name value pairs
• JSON has following types
  • String: "Hello"
  • Number: 10
  • Boolean: true
  • List: [1,2,3]
  • Object: {"key": "value"}

• JSON "KEY" : VALUE

• Python has a standard library json

• Generally json files end with .json extension

• Refer Here for reading and writing into json files

• Refer Here for changes

• Exercise: Our cli doesn’t support complete task

  • Extend todo list to support complete
  • If no action is provide cli should print usage
  • Test the remove task