# Python Lambda - Exercises, Practice, Solution

## Python Lambda [52 exercises with solution]

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**1.** Write a Python program to create a lambda function that adds 15 to a given number passed in as an argument, also create a lambda function that multiplies argument x with argument y and prints the result.

Sample Output:

25

48

Click me to see the sample solution

**2.** Write a Python program to create a function that takes one argument, and that argument will be multiplied with an unknown given number.

Sample Output:

Double the number of 15 = 30

Triple the number of 15 = 45

Quadruple the number of 15 = 60

Quintuple the number 15 = 75

Click me to see the sample solution

**3.** Write a Python program to sort a list of tuples using Lambda.

Original list of tuples:

[('English', 88), ('Science', 90), ('Maths', 97), ('Social sciences', 82)]

Sorting the List of Tuples:

[('Social sciences', 82), ('English', 88), ('Science', 90), ('Maths', 97)]

Click me to see the sample solution

**4.** Write a Python program to sort a list of dictionaries using Lambda.

Original list of dictionaries :

[{'make': 'Nokia', 'model': 216, 'color': 'Black'}, {'make': 'Mi Max', 'model': '2', 'color': 'Gold'}, {'make': 'Samsung', 'model': 7, 'color': 'Blue'}]

Sorting the List of dictionaries :

[{'make': 'Nokia', 'model': 216, 'color': 'Black'}, {'make': 'Samsung', 'model': 7, 'color': 'Blue'}, {'make': 'Mi Max', 'model': '2', 'color': 'Gold'}]

Click me to see the sample solution

**5.** Write a Python program to filter a list of integers using Lambda.

Original list of integers:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Even numbers from the said list:

[2, 4, 6, 8, 10]

Odd numbers from the said list:

[1, 3, 5, 7, 9]

Click me to see the sample solution

**6.** Write a Python program to square and cube every number in a given list of integers using Lambda.

Original list of integers:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Square every number of the said list:

[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

Cube every number of the said list:

[1, 8, 27, 64, 125, 216, 343, 512, 729, 1000]

Click me to see the sample solution

**7.** Write a Python program to find if a given string starts with a given character using Lambda.

Sample Output:

True

False

Click me to see the sample solution

**8.** Write a Python program to extract year, month, date and time using Lambda.

Sample Output:

2020-01-15 09:03:32.744178

2020

1

15

09:03:32.744178

Click me to see the sample solution

**9.** Write a Python program to check whether a given string is a number or not using Lambda.

Sample Output:

True

True

False

True

False

True

Print checking numbers:

True

True

Click me to see the sample solution

**10.** Write a Python program to create Fibonacci series up to n using Lambda.

Fibonacci series upto 2:

[0, 1]

Fibonacci series upto 5:

[0, 1, 1, 2, 3]

Fibonacci series upto 6:

[0, 1, 1, 2, 3, 5]

Fibonacci series upto 9:

[0, 1, 1, 2, 3, 5, 8, 13, 21]

Click me to see the sample solution

**11.** Write a Python program to find the intersection of two given arrays using Lambda.

Original arrays:

[1, 2, 3, 5, 7, 8, 9, 10]

[1, 2, 4, 8, 9]

Intersection of the said arrays: [1, 2, 8, 9]

Click me to see the sample solution

**12.** Write a Python program to rearrange positive and negative numbers in a given array using Lambda.

Original arrays:

[-1, 2, -3, 5, 7, 8, 9, -10]

Rearrange positive and negative numbers of the said array:

[2, 5, 7, 8, 9, -10, -3, -1]

Click me to see the sample solution

**13.** Write a Python program to count the even and odd numbers in a given array of integers using Lambda.

Original arrays:

[1, 2, 3, 5, 7, 8, 9, 10]

Number of even numbers in the above array: 3

Number of odd numbers in the above array: 5

Click me to see the sample solution

**14.** Write a Python program to filter a given list to determine if the values in the list have a length of 6 using Lambda.

Sample Output:

Monday

Friday

Sunday

Click me to see the sample solution

**15.** Write a Python program to add two given lists using map and lambda.

Original list:

[1, 2, 3]

[4, 5, 6]

Result: after adding two list

[5, 7, 9]

Click me to see the sample solution

**16.** Write a Python program to find the second lowest total marks of any student(s) from the given names and marks of each student using lists and lambda. Input the number of students, the names and grades of each student.

Input number of students: 5

Name: S ROY

Grade: 1

Name: B BOSE

Grade: 3

Name: N KAR

Grade: 2

Name: C DUTTA

Grade: 1

Name: G GHOSH

Grade: 1

Names and Grades of all students:

[['S ROY', 1.0], ['B BOSE', 3.0], ['N KAR', 2.0], ['C DUTTA', 1.0], ['G GHOSH', 1.0]]

Second lowest grade: 2.0

Names:

N KAR

Click me to see the sample solution

**17.** Write a Python program to find numbers divisible by nineteen or thirteen from a list of numbers using Lambda.

Orginal list:

[19, 65, 57, 39, 152, 639, 121, 44, 90, 190]

Numbers of the above list divisible by nineteen or thirteen:

[19, 65, 57, 39, 152, 190]

Click me to see the sample solution

**18.** Write a Python program to find palindromes in a given list of strings using Lambda.

Orginal list of strings:

['php', 'w3r', 'Python', 'abcd', 'Java', 'aaa']

List of palindromes:

['php', 'aaa']

Click me to see the sample solution

**19.** Write a Python program to find all anagrams of a string in a given list of strings using Lambda.

Orginal list of strings:

['bcda', 'abce', 'cbda', 'cbea', 'adcb']

Anagrams of 'abcd' in the above string:

['bcda', 'cbda', 'adcb']

Click me to see the sample solution

**20.** Write a Python program to find the numbers in a given string and store them in a list. Afterward, display the numbers that are longer than the length of the list in sorted form. Use the lambda function to solve the problem.

Original string: sdf 23 safs8 5 sdfsd8 sdfs 56 21sfs 20 5

Numbers in sorted form:

20 23 56

Click me to see the sample solution

**21.** Write a Python program that multiplies each number in a list with a given number using lambda functions. Print the results.

Original list: [2, 4, 6, 9, 11]

Given number: 2

Result:

4 8 12 18 22

Click me to see the sample solution

**22.** Write a Python program that sums the length of a list of names after removing those that start with lowercase letters. Use the lambda function.

Result:

16

Click me to see the sample solution

**23.** Write a Python program to calculate the sum of the positive and negative numbers of a given list of numbers using the lambda function.

Original list: [2, 4, -6, -9, 11, -12, 14, -5, 17]

Sum of the positive numbers: -32

Sum of the negative numbers: 48

Click me to see the sample solution

**24.** Write a Python program to find numbers within a given range where every number is divisible by every digit it contains.

Sample Output:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 15, 22]

Click me to see the sample solution

**25.** Write a Python program to create the next bigger number by rearranging the digits of a given number.

Original number: 12

Next bigger number: 21

Original number: 10

Next bigger number: False

Original number: 201

Next bigger number: 210

Original number: 102

Next bigger number: 120

Original number: 445

Next bigger number: 454

Click me to see the sample solution

**26.** Write a Python program to find a list with maximum and minimum length using lambda.

Original list:

[[0], [1, 3], [5, 7], [9, 11], [13, 15, 17]]

List with maximum length of lists:

(3, [13, 15, 17])

List with minimum length of lists:

(1, [0])

Click me to see the sample solution

**27.** Write a Python program to sort each sublist of strings in a given list of lists using lambda.

Original list:

[['green', 'orange'], ['black', 'white'], ['white', 'black', 'orange']]

After sorting each sublist of the said list of lists:

[['green', 'orange'], ['black', 'white'], ['black', 'orange', 'white']]

Click me to see the sample solution

**28.** Write a Python program to sort a given list of lists by length and value using lambda.

Original list:

[[2], [0], [1, 3], [0, 7], [9, 11], [13, 15, 17]]

Sort the list of lists by length and value:

[[0], [2], [0, 7], [1, 3], [9, 11], [13, 15, 17]]

Click me to see the sample solution

**29.** Write a Python program to find the maximum value in a given heterogeneous list using lambda.

Original list:

['Python', 3, 2, 4, 5, 'version']

Maximum values in the said list using lambda:

5

Click me to see the sample solution

**30.** Write a Python program to sort a given matrix in ascending order according to the sum of its rows using lambda.

Original Matrix:

[[1, 2, 3], [2, 4, 5], [1, 1, 1]]

Sort the said matrix in ascending order according to the sum of its rows

[[1, 1, 1], [1, 2, 3], [2, 4, 5]]

Original Matrix:

[[1, 2, 3], [-2, 4, -5], [1, -1, 1]]

Sort the said matrix in ascending order according to the sum of its rows

[[-2, 4, -5], [1, -1, 1], [1, 2, 3]]

Click me to see the sample solution

**31.** Write a Python program to extract a specified size of strings from a given list of string values using lambda.

Original list:

['Python', 'list', 'exercises', 'practice', 'solution']

length of the string to extract:

8

After extracting strings of specified length from the said list:

['practice', 'solution']

Click me to see the sample solution

**32.** Write a Python program to count float values in a mixed list using lambda.

Original list:

[1, 'abcd', 3.12, 1.2, 4, 'xyz', 5, 'pqr', 7, -5, -12.22]

Number of floats in the said mixed list:

3

Click me to see the sample solution

**33.** Write a Python program to check whether a given string contains a capital letter, a lower case letter, a number and a minimum length using lambda.

Input the string: W3resource

['Valid string.']

Click me to see the sample solution

**34.** Write a Python program to filter the height and width of students, which are stored in a dictionary using lambda.

Original Dictionary:

{'Cierra Vega': (6.2, 70), 'Alden Cantrell': (5.9, 65), 'Kierra Gentry': (6.0, 68), 'Pierre Cox': (5.8, 66)}

Height> 6ft and Weight> 70kg:

{'Cierra Vega': (6.2, 70)}

Click me to see the sample solution

**35.** Write a Python program to check whether a specified list is sorted or not using lambda.

Original list:

[1, 2, 4, 6, 8, 10, 12, 14, 16, 17]

Is the said list is sorted!

True

Original list:

[1, 2, 4, 6, 8, 10, 12, 14, 16, 17]

Is the said list is sorted!

False

Click me to see the sample solution

**36.** Write a Python program to extract the nth element from a given list of tuples using lambda.

Original list:

[('Greyson Fulton', 98, 99), ('Brady Kent', 97, 96), ('Wyatt Knott', 91, 94), ('Beau Turnbull', 94, 98)]

Extract nth element ( n = 0 ) from the said list of tuples:

['Greyson Fulton', 'Brady Kent', 'Wyatt Knott', 'Beau Turnbull']

Extract nth element ( n = 2 ) from the said list of tuples:

[99, 96, 94, 98]

Click me to see the sample solution

**37.** Write a Python program to sort a list of lists by a given index of the inner list using lambda.

Original list:

[('Greyson Fulton', 98, 99), ('Brady Kent', 97, 96), ('Wyatt Knott', 91, 94), ('Beau Turnbull', 94, 98)]

Sort the said list of lists by a given index ( Index = 0 ) of the inner list

[('Beau Turnbull', 94, 98), ('Brady Kent', 97, 96), ('Greyson Fulton', 98, 99), ('Wyatt Knott', 91, 94)]

Sort the said list of lists by a given index ( Index = 2 ) of the inner list

[('Wyatt Knott', 91, 94), ('Brady Kent', 97, 96), ('Beau Turnbull', 94, 98), ('Greyson Fulton', 98, 99)]

Click me to see the sample solution

**38.** Write a Python program to remove all elements from a given list present in another list using lambda.

Original lists:

list1: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

list2: [2, 4, 6, 8]

Remove all elements from 'list1' present in 'list2:

[1, 3, 5, 7, 9, 10]

Click me to see the sample solution

**39.** Write a Python program to find the elements of a given list of strings that contain a specific substring using lambda.

Original list:

['red', 'black', 'white', 'green', 'orange']

Substring to search:

ack

Elements of the said list that contain specific substring:

['black']

Substring to search:

abc

Elements of the said list that contain specific substring:

[]

Click me to see the sample solution

**40.** Write a Python program to find the nested list elements, which are present in another list using lambda.

Original lists:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]

[[12, 18, 23, 25, 45], [7, 11, 19, 24, 28], [1, 5, 8, 18, 15, 16]]

Intersection of said nested lists:

[[12], [7, 11], [1, 5, 8]]

Click me to see the sample solution

**41.** Write a Python program to reverse strings in a given list of string values using lambda.

Original lists:

['Red', 'Green', 'Blue', 'White', 'Black']

Reverse strings of the said given list:

['deR', 'neerG', 'eulB', 'etihW', 'kcalB']

Click me to see the sample solution

**42.** Write a Python program to calculate the product of a given list of numbers using lambda.

list1: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Product of the said list numbers:

3628800

list2: [2.2, 4.12, 6.6, 8.1, 8.3]

Product of the said list numbers:

4021.8599520000007

Click me to see the sample solution

**43.** Write a Python program to multiply all the numbers in a given list using lambda.

Original list:

[4, 3, 2, 2, -1, 18]

Mmultiply all the numbers of the said list: -864

Original list:

[2, 4, 8, 8, 3, 2, 9]

Mmultiply all the numbers of the said list: 27648

Click me to see the sample solution

**44.** Write a Python program to calculate the average value of the numbers in a given tuple of tuples using lambda.

Original Tuple:

((10, 10, 10), (30, 45, 56), (81, 80, 39), (1, 2, 3))

Average value of the numbers of the said tuple of tuples:

(30.5, 34.25, 27.0)

Original Tuple:

((1, 1, -5), (30, -15, 56), (81, -60, -39), (-10, 2, 3))

Average value of the numbers of the said tuple of tuples:

(25.5, -18.0, 3.75)

Click me to see the sample solution

**45.** Write a Python program to convert string elements to integers inside a given tuple using lambda.

Original tuple values:

(('233', 'ABCD', '33'), ('1416', 'EFGH', '55'), ('2345', 'WERT', '34'))

New tuple values:

((233, 33), (1416, 55), (2345, 34))

Click me to see the sample solution

**46.** Write a Python program to find the index position and value of the maximum and minimum values in a given list of numbers using lambda.

Original list:

[12, 33, 23, 10.11, 67, 89, 45, 66.7, 23, 12, 11, 10.25, 54]

Index position and value of the maximum value of the said list:

(5, 89)

Index position and value of the minimum value of the said list:

(3, 10.11)

Click me to see the sample solution

**47.** Write a Python program to sort a given mixed list of integers and strings using lambda. Numbers must be sorted before strings.

Original list:

[19, 'red', 12, 'green', 'blue', 10, 'white', 'green', 1]

Sort the said mixed list of integers and strings:

[1, 10, 12, 19, 'blue', 'green', 'green', 'red', 'white']

Click me to see the sample solution

**48.** Write a Python program to sort a given list of strings (numbers) numerically using lambda.

Original list:

['4', '12', '45', '7', '0', '100', '200', '-12', '-500']

Sort the said list of strings(numbers) numerically:

['-500', '-12', '0', '4', '7', '12', '45', '100', '200']

Click me to see the sample solution

**49.** Write a Python program to count the occurrences of items in a given list using lambda.

Original list:

[3, 4, 5, 8, 0, 3, 8, 5, 0, 3, 1, 5, 2, 3, 4, 2]

Count the occurrences of the items in the said list:

{3: 4, 4: 2, 5: 3, 8: 2, 0: 2, 1: 1, 2: 2}

Click me to see the sample solution

**50.** Write a Python program to remove specific words from a given list using lambda.

Original list:

['orange', 'red', 'green', 'blue', 'white', 'black']

Remove words:

['orange', 'black']

After removing the specified words from the said list:

['red', 'green', 'blue', 'white']

Click me to see the sample solution

**51.** Write a Python program to find the maximum and minimum values in a given list of tuples using the lambda function.

Original list with tuples:

[('V', 62), ('VI', 68), ('VII', 72), ('VIII', 70), ('IX', 74), ('X', 65)]

Maximum and minimum values of the said list of tuples:

(74, 62)

Click me to see the sample solution

**52.** Write a Python program to remove None values from a given list using the lambda function.

Original list:

[12, 0, None, 23, None, -55, 234, 89, None, 0, 6, -12]

Remove None value from the said list:

[12, 0, 23, -55, 234, 89, 0, 6, -12]

Click me to see the sample solution

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## Python: Tips of the Day

**Counts the occurrences of a value in a list:**

Example:

def tips_count_occurrences(lst, val): return len([x for x in lst if x == val and type(x) == type(val)]) print(tips_count_occurrences([2, 2, 5, 2, 2, 5, 7], 2))

Output:

4

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