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Check out our courses: Spring and Microservices Weekend Live Batch : https://bit.ly/spring-live-weekend Coupon: TELUSKO10 (10% Discount) Master Java Spring Development : https://bit.ly/java-spring-cloud For More Queries WhatsApp or Call on : +919008963671 website : https://courses.telusko.com/ Instagram : https://www.instagram.com/navinreddyofficial/ Linkedin : https://in.linkedin.com/in/navinreddy20 TELUSKO Android App : https://bit.ly/TeluskoApp Discord : https://discord.gg/D8hWe9BqfF In this lecture we will learn: - Filter Map and Reduce in Python - Use of filter(), map() and reduce() functions - How lambda function can be used with filter map and reduce - Syntax of Filter, Map and reduce function - Difference between filter(), map() and reduce() functions #1 - Lambda function can be used with these three functions: 1. filter() 2. map() 3. reduce() #2 - filter() function will take a list and do filtering and give values. - filter() takes a sequence and also returns a sequence. - filter() function takes two arguments: function and iterable. filter(func, iterable) - We have to give the definition of a function that we have passed as a condition in an argument. - The defined function should return a value of either True or False based on the condition. - Then, filter() will take the value that is returned by the defined function and does perform filtering based on this value. - In the defined function, we need only two things i.e, a variable and an expression. So, we can also use the lambda function instead of using the normal function to define the condition for a filter. -Lambda reduces the number of lines of code and makes it more precise. - Filter() simply returns the iterable passed to it. #3 - map() function is used when we want to change the value of every element of a list. - map() function also takes two arguments i.e., a function and an iterable. map(func, *iterables) - To get the result as a list, the built-in list() function can be called on the map object. - We have to define a function that we have passed as a condition in an argument. - The defined function should return any value. - The lambda function can also be used in an argument as a function instead of defining the normal function for the logic. - map() function returns a list. The function returns a map object which is a generator object. #4 - reduce() function is used to reduce the number of values from a list. - reduce() function belongs to a module known as functools. - We have to import the module functools from the library to use the reduce function. - reduce() also take two arguments i.e., a function and a sequence. reduce(func, iterable[, initial]) - We have to give the definition of a function that we have passed as a condition in an argument. - The lambda function can also be used in an argument as a function instead of defining the normal function for the logic. Python Tutorial to learn Python programming with examples Complete Python Tutorial for Beginners Playlist : https://www.youtube.com/watch?v=hEgO047GxaQ&t=0s&index=2&list=PLsyeobzWxl7poL9JTVyndKe62ieoN-MZ3 Python Tutorial in Hindi : https://www.youtube.com/watch?v=JNbup20svwU&list=PLk_Jw3TebqxD7JYo0vnnFvVCEv5hON_ew Github :- https://github.com/navinreddy20/Python- Java and Spring Framework For beginners with Spring Boot : - http://bit.ly/3LDMj8D Java Tutorial for Beginners (2023) :- http://bit.ly/3yARVbN Editing Monitors : https://amzn.to/2RfKWgL https://amzn.to/2Q665JW https://amzn.to/2OUP21a. Subscribe to our other channel: Navin Reddy : https://www.youtube.com/channel/UCxmk... Telusko Hindi : https://www.youtube.com/channel/UCitz... Donation: PayPal Id : navinreddy20 Patreon : navinreddy20 http://www.telusko.com/contactus