Lists – Methods (append, remove, pop, insert)
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. What does append() do?
2. What does pop() do?
3. What does remove('cat') do?
4. nums = [1,2,3]\nnums.insert(1, 99)\nWhat is nums?
5. nums = [3,1,2]\nnums.sort()\nWhat is nums?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1nums = [1,2,3] nums.remove(99) | AValid: Adds 4 to end of list | |
| 2nums = [] nums.pop() | BOk: Inserts 'new' at index 0 | |
| 3nums.append(4) | CError: 99 not in list | |
| 4nums.insert(0, 'new') | DError: pop from empty list | |
| 5n = [1,2,3] n.append(4) print(n) | EOutput: [1, 2, 3, 4] | |
| 6n = [1,2,3] print(n.pop()) | FOutput: 3 |
C
Definitions
.append(item)
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
nums = [1, 2, 3]
nums.______(4)
print(nums)
2.
nums = [1, 2, 3]
nums.______(0, 99)
print(nums)
3.
pets = ['cat', 'dog']
pets.______('cat')
print(pets)
4.
nums = [10, 20, 30]
last = nums.___()
print(last)
5.
nums = [3, 1, 2]
nums.____()
print(nums)
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
nums = [1, 2, 3]
B
nums = nums.append(4)
C
print('List:', nums)
D
print('Done')
Question 2
A
nums = [1, 2, 3]
B
nums.append(4, 5)
C
print('List:', nums)
D
print('Done')
Question 3
A
nums = [1, 2, 3]
B
nums.remove(5)
C
print('List:', nums)
D
print('Done')
Question 4
A
nums = [1, 2, 3]
B
nums.append[4]
C
print('List:', nums)
D
print('Done')
Question 5
A
sorted_nums = [3, 1, 2].sort()
B
nums = [3, 1, 2]
C
print('Sorted:', sorted_nums)
D
print('Done')
Answer Key
Lists – Methods (append, remove, pop, insert)
Section A: Quick Questions
Q1
A — Adds an item to the end
Q2
A — Removes and returns the last item
Q3
A — Removes the first 'cat'
Q4
B — [1, 99, 2, 3]
Q5
B — [1, 2, 3]
Section B: Match the Pairs
Q1
nums = [1,2,3]
nums.remove(99) → Error: 99 not in list
Q2
nums = []
nums.pop() → Error: pop from empty list
Q3
nums.append(4) → Valid: Adds 4 to end of list
Q4
nums.insert(0, 'new') → Ok: Inserts 'new' at index 0
Q5
n = [1,2,3]
n.append(4)
print(n) → Output: [1, 2, 3, 4]
Q6
n = [1,2,3]
print(n.pop()) → Output: 3
Section C: Definitions
Q1
.append(item) — Adds an item to the end of the list.~~.insert(index, item)Section D: Fill in the Blanks
Q1
nums = [1, 2, 3]
nums.append(4)
print(nums)Q2
nums = [1, 2, 3]
nums.insert(0, 99)
print(nums)Q3
pets = ['cat', 'dog']
pets.remove('cat')
print(pets)Q4
nums = [10, 20, 30]
last = nums.pop()
print(last)Q5
nums = [3, 1, 2]
nums.sort()
print(nums)Section E: Spot the Error
Q1
B — append() returns None: don't assign it back. It modifies the list in-place.
Q2
B — append() takes exactly one argument: add items one at a time
Q3
B — 5 is not in the list: remove() raises ValueError
Q4
B — Use parentheses () to call methods, not square brackets []
Q5
A — sort() returns None: it modifies in-place. Use sorted() to get a new sorted list.