Python List Exercise with Solutions

A list object is mutable in Python. Python list is sequences; Each list item is assigned to its position or index. Python list is the most widely used data structure, and a good understanding of list operations is necessary. This Python list exercise aims to help developers to learn and practice list operations to improve understanding of the Python list. All questions are tested on Python 3.

What included in this Python list exercise?

The exercise contains 10 questions and solutions provided for each question. This Python list coding exercise is nothing but Python List assignments to solve, where you can solve and practice different list programs, questions, problems, and challenges.

Each question includes a specific list related topic you need to practice. This list exercise covers questions on the following topics:

• Python List operations and manipulations
• Python List functions
• Python list slicing
• Python list comprehension

When you complete each question, you get more familiar with the Python list. Let us know if you have any alternative solutions. It will help other developers.

Use Online Code Editor to solve exercise questions.

Exercise Question 1: Given a Python list you should be able to display Python list in the following order

aLsit = [100, 200, 300, 400, 500]

Expected output:

[500, 400, 300, 200, 100]

aList = [100, 200, 300, 400, 500]
aList = aList[::-1]
print(aList)

Exercise Question 2: Concatenate two lists index-wise

list1 = ["M", "na", "i", "Ke"] 
list2 = ["y", "me", "s", "lly"]

Expected output:

['My', 'name', 'is', 'Kelly']

list1 = ["M", "na", "i", "Ke"] 
list2 = ["y", "me", "s", "lly"]
list3 = [i + j for i, j in zip(list1, list2)]
print(list3)

Exercise Question 3: Given a Python list. Turn every item of a list into its square

aList = [1, 2, 3, 4, 5, 6, 7]

Expected output:

[1, 4, 9, 16, 25, 36, 49]

aList = [1, 2, 3, 4, 5, 6, 7]
aList =  [x * x for x in aList]
print(aList)

Exercise Question 4: Concatenate two lists in the following order

list1 = ["Hello ", "take "]
list2 = ["Dear", "Sir"]

Expected output:

['Hello Dear', 'Hello Sir', 'take Dear', 'take Sir']

list1 = ["Hello ", "take "]
list2 = ["Dear", "Sir"]

resList = [x+y for x in list1 for y in list2]
print(resList)

Exercise Question 5: Given a two Python list. Iterate both lists simultaneously such that list1 should display item in original order and list2 in reverse order

list1 = [10, 20, 30, 40]
list2 = [100, 200, 300, 400]

Expected output:

10 400
20 300
30 200
40 100

list1 = [10, 20, 30, 40]
list2 = [100, 200, 300, 400]

for x, y in zip(list1, list2[::-1]):
    print(x, y)

Exercise Question 6: Remove empty strings from the list of strings

list1 = ["Mike", "", "Emma", "Kelly", "", "Brad"]

Expected output:

["Mike", "Emma", "Kelly", "Brad"]

list1 = ["Mike", "", "Emma", "Kelly", "", "Brad"]
resList = list(filter(None, list1))
print(resList)

Exercise Question 7: Add item 7000 after 6000 in the following Python List

list1 = [10, 20, [300, 400, [5000, 6000], 500], 30, 40]

Expected output:

[10, 20, [300, 400, [5000, 6000, 7000], 500], 30, 40]

list1 = [10, 20, [300, 400, [5000, 6000], 500], 30, 40]
list1[2][2].append(7000)
print(list1)

Exercise Question 8: Given a nested list extend it with adding sub list ["h", "i", "j"] in a such a way that it will look like the following list

Given List:

list1 = ["a", "b", ["c", ["d", "e", ["f", "g"], "k"], "l"], "m", "n"]

Sub List to be added = ["h", "i", "j"]

Expected output:

['a', 'b', ['c', ['d', 'e', ['f', 'g', 'h', 'i', 'j'], 'k'], 'l'], 'm', 'n']

list1 = ["a", "b", ["c", ["d", "e", ["f", "g"], "k"], "l"], "m", "n"]
subList = ["h", "i", "j"]

list1[2][1][2].extend(subList)
print(list1)

Exercise Question 9: Given a Python list, find value 20 in the list, and if it is present, replace it with 200. Only update the first occurrence of a value

list1 = [5, 10, 15, 20, 25, 50, 20]

Expected output:

list1 = [5, 10, 15, 200, 25, 50, 20]

list1 = [5, 10, 15, 20, 25, 50, 20]

index = list1.index(20)
list1[index] = 200
print(list1)

Exercise Question 10: Given a Python list, remove all occurrence of 20 from the list

list1 = [5, 20, 15, 20, 25, 50, 20]

Expected output:

[5, 15, 25, 50]

list1 = [5, 20, 15, 20, 25, 50, 20]

def removeValue(sampleList, val):
   return [value for value in sampleList if value != val]
resList = removeValue(list1, 20)
print(resList)