Dictionaries – Basics (creation, accessing)
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. What is a dictionary?
2. How do you create a dictionary?
3. d = {'a': 1}\nprint(d['a'])\nWhat prints?
4. What separates a key from its value?
5. Can dictionary keys be duplicated?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1person = {'name': 'Ali'} print(person['age']) | AError: Keys need quotes if string | |
| 2d = {name: 'Alice'} | BOutput: <class 'dict'> | |
| 3person = {'name': 'Ali', 'age': 20} | CValid: Dict with two key-value pairs | |
| 4d = {} d['x'] = 10 | DError: Key 'age' doesn't exist | |
| 5p = {'name':'Ali'} print(p['name']) | EOutput: Ali | |
| 6p = {} print(type(p)) | FOk: Add key to empty dict |
C
Definitions
Dictionary
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
person = _'name': 'Alice'_
2.
print(person[______])
3.
d = {}
d[_______] = 'blue'
4.
pet = {'type'_ 'cat'}
5.
scores = {'math': 90_ 'english': 85}
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
# Create a person dictionary
B
person = ['name': 'Alice']
C
print('Name:', person['name'])
D
print('Done')
Question 2
A
# Create a person dictionary
B
person = {'name' = 'Alice'}
C
print('Name:', person['name'])
D
print('Done')
Question 3
A
person = {'name': 'Alice'}
B
greeting = person[name]
C
print('Hello,', greeting)
D
print('Done')
Question 4
A
person = {'name': 'Alice'}
B
greeting = person('name')
C
print('Hello,', greeting)
D
print('Done')
Question 5
A
person = {'name': 'Alice'}
B
label = 'Greeting'
C
greeting = person.name
D
print('Hello,', greeting)
Answer Key
Dictionaries – Basics (creation, accessing)
Section A: Quick Questions
Q1
B — A collection of key-value pairs
Q2
A — Curly braces {}
Q3
A — 1
Q4
A — A colon :
Q5
B — No each key must be unique
Section B: Match the Pairs
Q1
person = {'name': 'Ali'}
print(person['age']) → Error: Key 'age' doesn't exist
Q2
d = {name: 'Alice'} → Error: Keys need quotes if string
Q3
person = {'name': 'Ali', 'age': 20} → Valid: Dict with two key-value pairs
Q4
d = {}
d['x'] = 10 → Ok: Add key to empty dict
Q5
p = {'name':'Ali'}
print(p['name']) → Output: Ali
Q6
p = {}
print(type(p)) → Output: <class 'dict'>
Section C: Definitions
Q1
Dictionary — A collection of key-value pairs in curly braces {}.~~KeySection D: Fill in the Blanks
Q1
person = {'name': 'Alice'}Q2
print(person['name'])Q3
d = {}
d['color'] = 'blue'Q4
pet = {'type': 'cat'}Q5
scores = {'math': 90, 'english': 85}Section E: Spot the Error
Q1
B — Dictionaries use curly braces {}, not square brackets []
Q2
B — Use colon : between key and value, not equals =
Q3
B — Key must be in quotes: 'name' is a string, not a variable
Q4
B — Use square brackets [] to access keys, not parentheses ()
Q5
C — Use bracket notation person['name'], not dot notation person.name