Length and iteration methods in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to find the length of the list.

Python

numbers = [1, 2, 3, 4, 5]
length = [1](numbers)
print(length)

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

Asize

Bcount

Clen

Dlength

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'count' which counts occurrences of a value, not length.

Using 'size' or 'length' which are not Python functions.

The len() function returns the number of items in a list.

2fill in blank

medium

Complete the code to iterate over each character in the string.

Python

word = "hello"
for [1] in word:
    print(letter)

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

Achar

Bword

Cstring

Dletter

Attempts:

3 left

💡 Hint

Common Mistakes

Using the string variable itself as the loop variable.

Using a variable name not matching the print statement.

The variable letter is used to represent each character in the string during iteration.

3fill in blank

hard

Fix the error in the code to correctly count the number of times 'a' appears in the list.

Python

letters = ['a', 'b', 'a', 'c', 'a']
count_a = letters.[1]('a')
print(count_a)

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

Acount

Blength

Cindex

Dfind

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'length' which is not a list method.

Using 'index' which finds the first position, not count.

Using 'find' which is a string method, not list.

The count() method counts how many times a value appears in a list.

4fill in blank

hard

Fill both blanks to create a dictionary with words as keys and their lengths as values, only for words longer than 3 letters.

Python

words = ['apple', 'bat', 'carrot', 'dog']
lengths = {word: [1] for word in words if [2] > 3}

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

Alen(word)

Bword

Attempts:

3 left

💡 Hint

Common Mistakes

Using the word itself instead of its length in the condition.

Mixing up keys and values in the dictionary comprehension.

The dictionary comprehension uses len(word) to get the length and filters words with length greater than 3.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase words as keys, their original words as values, only for words longer than 3 letters.

Python

words = ['apple', 'bat', 'carrot', 'dog']
result = { [1]: [2] for word in words if len(word) [3] 3}

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

Aword.upper()

Bword

C>

Dlen(word)

Attempts:

3 left

💡 Hint

Common Mistakes

Using the length as a key instead of uppercase word.

Using wrong comparison operator in the condition.

The dictionary comprehension uses word.upper() as keys, original word as values, and filters words with length greater than 3.