Adding and updating key-value pairs in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a new key-value pair to the dictionary.

Python

my_dict = {'a': 1, 'b': 2}
my_dict[[1]] = 3
print(my_dict)

Drag options to blanks, or click blank then click option'

A'd'

B'b'

C'a'

D'c'

Attempts:

3 left

💡 Hint

Common Mistakes

Using an existing key will update the value, not add a new pair.

Forgetting to put the key in quotes if it is a string.

To add a new key-value pair, use a new key like 'c'.

2fill in blank

medium

Complete the code to update the value of an existing key in the dictionary.

Python

my_dict = {'x': 10, 'y': 20}
my_dict[[1]] = 30
print(my_dict)

Drag options to blanks, or click blank then click option'

A'z'

B'x'

C'a'

D'y'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a new key will add a new pair instead of updating.

Forgetting to use quotes around the key string.

To update a value, use the existing key 'x'.

3fill in blank

hard

Fix the error in the code to add a key-value pair correctly.

Python

data = {'name': 'Alice'}
data[[1]] = 'Bob'
print(data)

Drag options to blanks, or click blank then click option'

A'age'

Bage

Cname

D'name'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name without quotes causes a NameError.

Confusing keys with values.

Keys must be strings in quotes if they are text.

4fill in blank

hard

Fill both blanks to add a new key-value pair where the key is 'color' and the value is 'blue'.

Python

info = {'size': 'large'}
info[[1]] = [2]
print(info)

Drag options to blanks, or click blank then click option'

A'color'

B'blue'

C'red'

D'shape'

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping key and value positions.

Forgetting quotes around strings.

Use 'color' as the key and 'blue' as the value to add the pair.

5fill in blank

hard

Fill all three blanks to update the dictionary with a new key 'age' and value 25, then print the updated dictionary.

Python

person = {'name': 'John', 'city': 'NYC'}
person[[1]] = [2]
print([3])

Drag options to blanks, or click blank then click option'

A'age'

B25

Cperson

D'name'

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around numbers.

Printing a wrong variable name.

Use 'age' as the key, 25 as the value, and print the dictionary variable 'person'.