List creation and representation in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a list named fruits with three items: 'apple', 'banana', and 'cherry'.

Python

fruits = [1]

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

A{'apple', 'banana', 'cherry'}

B('apple', 'banana', 'cherry')

C['apple', 'banana', 'cherry']

D'apple', 'banana', 'cherry'

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses instead of square brackets creates a tuple, not a list.

Using curly braces creates a set, which is unordered.

Writing items without brackets creates a syntax error.

Lists in Python are created using square brackets []. So, ['apple', 'banana', 'cherry'] is the correct way to create a list with these items.

2fill in blank

medium

Complete the code to create an empty list named numbers.

Python

numbers = [1]

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

A[]

B()

C{}

D''

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses creates an empty tuple, not a list.

Using curly braces creates an empty dictionary, not a list.

Using empty quotes creates an empty string.

An empty list is created with empty square brackets [].

3fill in blank

hard

Fix the error in the code to correctly create a list named colors with 'red', 'green', and 'blue'.

Python

colors = [1]

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

A['red', 'green', 'blue']

B{'red', 'green', 'blue'}

C('red', 'green', 'blue')

D'red', 'green', 'blue'

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses instead of square brackets.

Using curly braces which create a set.

Listing items without brackets causes syntax errors.

The code must use square brackets to create a list. Parentheses create tuples, curly braces create sets, and just commas create a syntax error.

4fill in blank

hard

Fill both blanks to create a list of squares for numbers 1 to 5 using list comprehension.

Python

squares = [x[1] for x in range(1, 6) if x [2] 3]

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

A**2

B>

C<=

D*2

Attempts:

3 left

💡 Hint

Common Mistakes

Using *2 instead of **2 for squaring.

Using <= instead of > in the condition.

Forgetting the exponent operator.

The expression x**2 calculates the square of x. The condition x > 3 filters numbers greater than 3.

5fill in blank

hard

Fill all three blanks to create a dictionary where keys are uppercase words and values are their lengths, but only for words longer than 4 letters.

Python

result = { [1]: [2] for word in words if len(word) [3] 4 }

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

Aword.upper()

Blen(word)

C>

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

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

Using word instead of len(word) for values.

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

The key is the uppercase word using word.upper(). The value is the length with len(word). The condition filters words longer than 4 letters using >.