What is lambda function in Python and why do we need it?

Asked by Last Modified  

2 Answers

Learn Python

Follow 2
Answer

Please enter your answer

Sukruti

Crafting Seamless User Experiences with Full-Stack React Expertise

A lambda function in Python is an anonymous function defined using the lambda keyword. It is a concise way to create functions without a name, typically used for short, simple operations. Syntax lambda arguments: expression Arguments: Input parameters to the function. Expression: A single-line...
read more
A lambda function in Python is an anonymous function defined using the lambda keyword. It is a concise way to create functions without a name, typically used for short, simple operations. Syntax lambda arguments: expression Arguments: Input parameters to the function. Expression: A single-line operation or computation performed. Example # Lambda to add two numbers add = lambda x, y: x + y print(add(3, 5)) # Output: 8 Why Do We Need Lambda Functions? 1. Concise: Useful for short, one-time functions without defining them explicitly. 2. Inline Use: Commonly used as arguments for higher-order functions like map(), filter(), and sorted(). 3. Improves Readability: Reduces boilerplate code when writing simple operations. Common Use Cases 1. With map(): nums = [1, 2, 3] squares = map(lambda x: x**2, nums) print(list(squares)) # Output: [1, 4, 9] 2. With filter(): nums = [1, 2, 3, 4] evens = filter(lambda x: x % 2 == 0, nums) print(list(evens)) # Output: [2, 4] 3. With sorted(): data = [('apple', 2), ('banana', 1)] sorted_data = sorted(data, key=lambda x: x[1]) print(sorted_data) # Output: [('banana', 1), ('apple', 2)] While lambda functions are useful for simplicity, use named functions for complex logic to enhance readability. read less
1 Comments
Dislike Bookmark

I am online Quran teacher 7 years

a keyword in Python for defining the anonymous function.
Comments
Dislike Bookmark

Related Questions

SVM is applicable only for numeric data or can also be for textual data?
SVM can work with textual data also. However you have to train the SVM to classify the text data. It is a usual practice to create a document-term matrix from the text that you have, to make SVM work easily on the data.
Harsha
Hi, I'm BCA graduate, and I have seven years in the general insurance field now I want to change my profile and upgrade my knowledge. Will learning python help me with my growth in my career?
Hi, as far as my knowledge goes first, you should learn data processing tools or programs like MS Excel, Power Bi, or SQL then you should then take a leap into Python, which will make automating your work quite simple.
Supriya
How do I learn Python?
Start with online tutorials, books, and practice coding. Join communities and work on projects to improve.
Kirti
0 0
View Comments6
X=4 Y=X+4 Y=INT(STR(Y)+'2') PRINT(Y)
Here is how it works: 1. X takes the value of 4 2. Y takes the value of 8 ( Y=X+4 ) 3a. str(Y) is evaluated as '8' 3b. next, str(Y)+'2' is evaluated - this gives us '82' 3c. next, INT('82') gets...
Annu
Are there coding standards or a style guide for Python programs?
The PEP 8 -- Style Guide for Python Code provides a fairly comprehensive list of Python naming conventions. Here are a few examples, but you should consult the PEP 8 style guide for more detailed information...
A
0 0
View Comments7

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Decorator Advanced ( Passing Parameter )
Hope you read our previous note about the basic concept of python-decorators, if not, please read first Let see what are the possible ways to utilise the decorators in real time.Well, here we are going...

Logeswaran

0 0
View Comments0
Using Lambda and Filter with Regular expressions.
1) Start the Python interpreter and import the re module: >>> import re 2)Define a tuple strings to filter with regular expressions: t=('python','pycon','perl','peril','step','stop','come','came','exercise','hello','storm','my.mail','year','yam') ...

Michael Devine

0 0
View Comments0
Be prepared to get trained--init
Before starting the training,students must be mentally prepared for acceptance of new knowledge. Students must attend training with open minded forgetting the position they are working.This will help...
S

Smartnub Softsolutions

0 0
View Comments0
Decorators In Python
A decorator takes in a function, adds some functionality and returns it. Functions and methods are called callable as they can be called. Any object which implements the special method __call__() is...

Praveen Choudhary

0 0
View Comments0
Learn Python : Formatting with the .format () method
A good way to format objects into your strings for print statements is with the string.format() method. The syntax is :'String here {} then also {}'.format('something1','something2')Example 1:print("This...
B

Biswanath Banerjee

0 1
View Comments0

Recommended Articles

Top 5 reasons why you should learn Python

Python is one of the most popular programming languages in the world. It is general-purpose, object oriented, high-level programming language used in a number of programming fields. Python is a great programming language to learn as it will introduce you to the world of programming. If you are from the technical background...

Read full article >

Top 5 Skills Every Software Developer Must have

Software Development has been one of the most popular career trends since years. The reason behind this is the fact that software are being used almost everywhere today.  In all of our lives, from the morning’s alarm clock to the coffee maker, car, mobile phone, computer, ATM and in almost everything we use in our daily...

Read full article >

8 Hottest IT Careers of 2014!

Whether it was the Internet Era of 90s or the Big Data Era of today, Information Technology (IT) has given birth to several lucrative career options for many. Though there will not be a “significant" increase in demand for IT professionals in 2014 as compared to 2013, a “steady” demand for IT professionals is rest assured...

Read full article >

Learn Microsoft Excel

Microsoft Excel is an electronic spreadsheet tool which is commonly used for financial and statistical data processing. It has been developed by Microsoft and forms a major component of the widely used Microsoft Office. From individual users to the top IT companies, Excel is used worldwide. Excel is one of the most important...

Read full article >

Find Python Training classes near you
Python Training classes in Bangalore
Python Training classes in Hyderabad
Python Training classes in Chennai
Python Training classes in Delhi
Python Training classes in Pune
Python Training classes in Mumbai
Python Training classes in Noida
Python Training classes in Kolkata
Python Training classes in Gurgaon
Python Training classes in Ghaziabad
Online Python Training

Looking for Python Training classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you