Adding and removing list elements in Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

How do you add an element to the end of a list in Python?

Use the append() method. For example, my_list.append(5) adds 5 to the end of my_list.

beginner

What method removes and returns the last element from a list?

The pop() method removes and returns the last element. For example, item = my_list.pop() removes the last item and stores it in item.

intermediate

How can you add an element at a specific position in a list?

Use the insert(index, element) method. It adds the element at the given index, shifting others to the right. Example: my_list.insert(1, 'a') adds 'a' at position 1.

beginner

How do you remove a specific element by value from a list?

Use the remove(value) method. It deletes the first occurrence of the value. Example: my_list.remove(3) removes the first 3 found.

intermediate

What happens if you try to remove an element that is not in the list using remove()?

Python raises a ValueError because the element is not found in the list.

Which method adds an element to the end of a list?

A append()

B insert()

C remove()

D pop()

The append() method adds an element to the end of the list.

What does pop() do when called without arguments?

A Removes a specific value

B Removes and returns the last element

C Adds an element to the end

D Removes the first element

pop() removes and returns the last element of the list.

How do you add an element at index 2 in a list?

A my_list.append(2)

B my_list.remove(2)

C my_list.insert(2, element)

D my_list.pop(2)

Use insert(index, element) to add at a specific position.

Which method removes the first occurrence of a value from a list?

A insert()

B append()

C pop()

D remove()

remove(value) deletes the first matching value from the list.

What error occurs if you try to remove a value not in the list?

A ValueError

B IndexError

C TypeError

D KeyError

Trying to remove a non-existent value raises a ValueError.

Explain how to add elements to a Python list and the difference between append() and insert().

Think about adding items to a shopping list either at the end or in the middle.

Describe the ways to remove elements from a list and what happens if you remove a value not present.

Consider taking items off a shelf by position or by name.