Lambda with map() in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to double each number in the list using map and a lambda function.

Python

numbers = [1, 2, 3, 4]
doubled = list(map(lambda x: x [1] 2, numbers))
print(doubled)

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

A*

B+

C-

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using + instead of * will add 2 instead of doubling.

Using / will divide the number by 2, not double it.

The lambda function multiplies each number by 2 using the * operator.

2fill in blank

medium

Complete the code to convert each string in the list to uppercase using map and a lambda.

Python

words = ['apple', 'banana', 'cherry']
upper_words = list(map(lambda w: w[1](), words))
print(upper_words)

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

Alower

Bcapitalize

Cupper

Dtitle

Attempts:

3 left

💡 Hint

Common Mistakes

Using lower() will convert to lowercase instead.

Using capitalize() only changes the first letter.

The lambda calls the upper() method to convert each word to uppercase.

3fill in blank

hard

Fix the error in the lambda function to add 5 to each number using map.

Python

nums = [10, 20, 30]
result = list(map(lambda n: n [1] 5, nums))
print(result)

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

A-

B*

C/

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using - subtracts 5 instead of adding.

Using * multiplies instead of adding.

The lambda should add 5 to each number using the + operator.

4fill in blank

hard

Fill both blanks to create a list of squares of even numbers only using map and filter with lambda.

Python

numbers = [1, 2, 3, 4, 5, 6]
even_squares = list(map(lambda x: x[1]2, filter(lambda x: x [2] 2 == 0, numbers)))
print(even_squares)

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

A**

B%

C//

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using + or // instead of ** for squaring.

Using // or + instead of % for checking evenness.

The first lambda squares the number using **. The second lambda filters even numbers using the modulo operator %.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys and values doubled only if value is greater than 10.

Python

data = {'a': 5, 'b': 15, 'c': 20}
result = { [1]: [2]*2 for k, v in data.items() if v [3] 10 }
print(result)

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

Ak.upper()

Bv

C>

Dk

Attempts:

3 left

💡 Hint

Common Mistakes

Using k instead of k.upper() for keys.

Using v without doubling.

Using < or == instead of > in the condition.

The dictionary comprehension uses k.upper() for keys, doubles the value v, and filters values greater than 10 with >.