Track 6 · Lesson 2 of 12

Changing lists: methods and mutability

Grow, shrink and reorder lists with append, insert, remove, pop, extend and sort, and know when a list is changed in place.

You will be able to

• Add items with append, insert and extend, and remove them with remove and pop
• Explain what it means that a list is mutable and that a method changes it in place
• Choose between list.sort() and sorted() and avoid the None trap
• Write functions that build a new list instead of changing their input