zip() function in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to combine two lists into pairs using the zip() function.

Python

list1 = [1, 2, 3]
list2 = ['a', 'b', 'c']
combined = [1](list1, list2)
print(list(combined))

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

Afilter

Brange

Cmap

Dzip

Attempts:

3 left

💡 Hint

Common Mistakes

Using range() instead of zip() causes a TypeError when printing.

Using map() or filter() won't combine lists into pairs.

The zip() function pairs elements from two lists together. Here, it combines list1 and list2 into pairs.

2fill in blank

medium

Complete the code to print pairs of elements from two lists using zip() in a for loop.

Python

names = ['Alice', 'Bob', 'Charlie']
ages = [25, 30, 35]
for [1], age in zip(names, ages):
    print(f"{name} is {age} years old")

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

Aages

Bnames

Cname

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'names' instead of 'name' causes confusion because 'names' is the whole list.

Using 'age' or 'ages' for the first variable is incorrect because it matches the second list.

The variable name holds each element from the names list during iteration. It matches the first item from each pair created by zip().

3fill in blank

hard

Fix the error in the code by completing the blank to correctly unzip a list of pairs.

Python

pairs = [(1, 'a'), (2, 'b'), (3, 'c')]
numbers, letters = zip(*[1])
print(numbers)
print(letters)

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

Apairs

Blist

Czip

Denumerate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'list' causes a TypeError because it's a type, not the variable.

Using 'zip' or 'enumerate' causes errors because they are functions, not the data.

The * operator unpacks the list of pairs. We need to unpack the variable pairs to unzip the elements into separate tuples.

4fill in blank

hard

Fill both blanks to create a dictionary from two lists using zip() and a dictionary comprehension.

Python

keys = ['name', 'age', 'city']
values = ['Alice', 30, 'New York']
info = [1]([2] for [2] in zip(keys, values))
print(info)

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

Adict

Bitem

Citems

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'list' instead of 'dict' creates a list of tuples, not a dictionary.

Using 'items' instead of 'item' causes a NameError because the variable is undefined.

The zip(keys, values) pairs keys and values. The dictionary constructor dict() creates a dictionary from these pairs. The variable item represents each pair in the comprehension.

5fill in blank

hard

Fill all three blanks to filter pairs from two lists where the number is greater than 2 using zip() and a dictionary comprehension.

Python

nums = [1, 2, 3, 4]
letters = ['a', 'b', 'c', 'd']
filtered = [1]([2]: [3] for [2], letter in zip(nums, letters) if [2] > 2)
print(filtered)

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

Adict

Bnum

Cletter

Ditem

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'item' instead of 'num' or 'letter' causes confusion and errors.

Not using dict() results in a generator object, not a dictionary.

The dictionary comprehension creates a dictionary from pairs where the number is greater than 2. num is the variable for numbers, letter for letters, and dict() builds the dictionary.