Join us and get access to thousands of tutorials and a community of expert Pythonistas.
This lesson is for members only. Join us and get access to thousands of tutorials and a community of expert Pythonistas.
Python Lambda Functions (Summary)
Now that you’ve completed this step-by-step course, you know how to use Python lambda functions! You are now able to do all of the following:
- Write Python lambdas and use anonymous functions
- Choose wisely between lambdas or normal Python functions
- Avoid excessive use of lambdas
- Use lambdas with higher-order functions or Python key functions
Python lambdas are like salt. A pinch in your spam, ham, and eggs will enhance the flavors, but too much will spoil the dish. If you have a penchant for mathematics, you may have some fun exploring the fascinating world of lambda calculus.
Take the Quiz: Test your knowledge with our interactive “Python Lambda Functions” quiz. You’ll receive a score upon completion to help you track your learning progress:
Interactive Quiz
Python Lambda FunctionsPython lambdas are little, anonymous functions, subject to a more restrictive but more concise syntax than regular Python functions. Test your understanding on how you can use them better!
Congratulations, you made it to the end of the course! What’s your #1 takeaway or favorite thing you learned? How are you going to put your newfound skills to use? Leave a comment in the discussion section and let us know.
00:01 Well done! You’ve completed this course on using lambda functions. You found out what a lambda function is. You found out where lambda functions are useful.
00:12 You’ve created some first lambda functions of your own.
00:16
You’ve seen how lambda functions are used in conjunction with methods such as .sort() and functions such as filter(), map(), and reduce().
00:26 And you’ve seen how to test lambda functions. I hope you found this course useful and we’ll see you again soon at realpython.com.
k0ng0 on Aug. 29, 2019
Good intro to lambdas. keep them coming.
Najmeh on Sept. 1, 2019
Thanks a lot.
Paul on Sept. 2, 2019
Why use map or filter with the availability of comprehensions?
Mallesham Yamulla on Sept. 2, 2019
Many thanks for the tutorial, and I’m highly recommending this tutorials to the audience who would like brush up their knowledge on writing lambda function.
Sergio on Sept. 2, 2019
Nice intro to lambdas. Thanks for sharing it!
dobrycheva on Sept. 24, 2019
thank you! :)
Pakorn on Jan. 15, 2020
Great tutorial, Thanks!
Shubhro on Jan. 27, 2020
Great tutorial on lambdas!
Ariadna on April 26, 2020
Great course!! Very clear!!
Mark on June 22, 2020
Thanks, Great material
sistersolstice on July 11, 2020
Wonderful! This provided so much clarity to lambda. I haven’t used it much but will start now since I know how it works. Thanks.
a5zima on July 20, 2020
This is a great idea to combine sort/map/filer/reduce with the lambda explanation! Finally I understand the concept and power of a lambda function. Thank you.
cottonbytes on Aug. 9, 2020
Nice! Well explained! Thanks!
Shuai on May 6, 2021
Thanks for the great course!
Become a Member to join the conversation.
john09 on Aug. 28, 2019
Very nice. Have seen “lambda” keyword and used it a little, not knowing exactly what’s going on. Great explanation.