Lists + Dictionaries
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. {1,2,3} | {3,4,5} returns?
2. {1,2,3} & {2,3,4} returns?
3. {1,2,3} - {2,3,4} returns?
4. {1,2,3} ^ {2,3,4} returns?
5. What does | do with sets?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1a = {1,2} b = [3,4] a | b | AOutput: {1, 2, 3} | |
| 2s = {1,2,3} s.add([4,5]) | BOk: Difference {1} | |
| 3a = {1,2,3} b = {2,3,4} a & b | CError: Both must be sets for | | |
| 4a = {1,2,3} b = {2,3,4} a - b | DValid: Intersection {2, 3} | |
| 5a={1,2} b={2,3} print(a | b) | EError: Lists can't be set elements | |
| 6a={1,2} b={2,3} print(a & b) | FOutput: {2} |
C
Definitions
Union
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
a = {1, 2, 3}
b = {3, 4}
print(a _ b)
2.
a = {1, 2, 3}
b = {2, 3, 4}
print(a _ b)
3.
a = {1, 2, 3}
b = {2, 3}
print(a _ b)
4.
a = {1, 2}
b = {1, 2, 3}
print(a.________(b))
5.
a = {1, 2, 3}
b = {2, 3, 4}
print(a _ b)
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
a = {1, 2, 3}
B
b = {3, 4}
C
print(a + b)
Question 2
A
a = {1, 2, 3}
B
b = {2, 3, 4}
C
print(a and b)
Question 3
A
a = {1, 2, 3}
B
b = {2, 3, 4}
C
print(a or b)
Question 4
A
a = {1, 2, 3}
B
b = {3, 4}
C
combined = a.union[b]
D
print('Union:', combined)
Question 5
A
print({1, 2}.subset({1, 2, 3}))
B
a = {1, 2}
C
b = {1, 2, 3}
D
print('Done')
Answer Key
Lists + Dictionaries
Section A: Quick Questions
Q1
B — {1, 2, 3, 4, 5}
Q2
A — {2, 3}
Q3
B — {1}
Q4
A — {1, 4}
Q5
A — Union combines all items
Section B: Match the Pairs
Q1
a = {1,2}
b = [3,4]
a | b → Error: Both must be sets for |
Q2
s = {1,2,3}
s.add([4,5]) → Error: Lists can't be set elements
Q3
a = {1,2,3}
b = {2,3,4}
a & b → Valid: Intersection {2, 3}
Q4
a = {1,2,3}
b = {2,3,4}
a - b → Ok: Difference {1}
Q5
a={1,2}
b={2,3}
print(a | b) → Output: {1, 2, 3}
Q6
a={1,2}
b={2,3}
print(a & b) → Output: {2}
Section C: Definitions
Q1
Union — Combines all items from both sets with no duplicates.~~IntersectionSection D: Fill in the Blanks
Q1
a = {1, 2, 3}
b = {3, 4}
print(a | b)Q2
a = {1, 2, 3}
b = {2, 3, 4}
print(a & b)Q3
a = {1, 2, 3}
b = {2, 3}
print(a - b)Q4
a = {1, 2}
b = {1, 2, 3}
print(a.issubset(b))Q5
a = {1, 2, 3}
b = {2, 3, 4}
print(a ^ b)Section E: Spot the Error
Q1
C — Sets don't support + for union. Use | or .union().
Q2
C — Use & for set intersection, not 'and' (which is a boolean operator)
Q3
C — Use | for set union, not 'or' (which is a boolean operator)
Q4
C — Use parentheses () to call methods, not square brackets []
Q5
A — The method is issubset(), not subset()