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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 Udemy Courses: Java:- https://bit.ly/JavaUdemyTelusko Spring:- https://bit.ly/SpringUdemyTelusko Java For Programmers:- https://bit.ly/javaProgrammers 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 In this lecture we are discussing about Dictionary: -- if you want to accessing the data by using key then we are using dictionary -- Dictionary uses key and value pair key and value in python data={1:'Navin',2:'kiran',4:'Harsh'} # 1 is key and Navin is value and 2 is key and kiran is value and 4 is key and Harsh is value property of dictionary: -- key must be immutable and unique # immutable means we can't change the value # unique means we can't repeat the key -- value can be anything -- we can access the value by using key -- we can't access the value by using index -- we can't access the value by using value fetching the value from dictionary data[4] # we can access the value by using key here key is 4 data[3] # you get error because key is not present in dictionary get() method: -- we can access the value by using get() method -- if key is present in dictionary then it will return the value -- if key is not present in dictionary then it will return None data.get(1) data.get(3) # not get anything print(data.get(3)) # it will return None data.get(1,'Not Found') data.get(3,'Not Found') use of zip() method: -- we can combine the two list by using zip() method -- it will return the tuple keys = ['Navin','Kiran','Harsh'] values=['Python','Java','JS'] use of dict() method: -- we can convert the tuple into dictionary by using dict() method data=dict(zip(keys,values)) data['Kiran'] data['Monika'] # it will give error because key is not present in dictionary add the value in dictionary: data['Monika']='CS' data delete the value from dictionary: del data['Harsh'] Nested Dictionary: -- we can store the dictionary inside the dictionary prog={'JS':'Atom','CS':'VS','Python':['Pycharm','Sublime'],'Java':{'JSE':'Netbeans','JEE':'Eclipse'}} prog prog['JS'] prog['python'][1] prog['Java'] prog['Java']['JEE'] Spring Full Course : https://courses.telusko.com/learn/Spring5? Python for Beginners :- http://bit.ly/3JOLQhl Rest API in Spring Boot : https://goo.gl/5Wgsk6 Restful Web Services Tutorial : https://goo.gl/3mosnz Spring Boot Tutorials : https://goo.gl/7894NE Editing Monitors : https://amzn.to/2RfKWgL https://amzn.to/2Q665JW https://amzn.to/2OUP21a. Editing Laptop : ASUS ROG Strix - (new version) https://amzn.to/2RhumwO Asus vivoBook :https://amzn.to/2wS0Hpt Camera : https://amzn.to/2OR56AV lens : https://amzn.to/2JihtQo Mics https://amzn.to/2RlIe9F https://amzn.to/2yDkx5F https://amzn.to/2WYqLde Java:- https://bit.ly/JavaUdemyTelusko Spring:- https://bit.ly/SpringUdemyTelusko More Learning : Java :- https://bit.ly/3x6rr0N Python :- https://bit.ly/3GRc7JX Django :- https://bit.ly/3MmoJK6 JavaScript :- https://bit.ly/3tiAlHo Node JS :- https://bit.ly/3GT4liq Rest Api :-https://bit.ly/3MjhZwt Servlet :- https://bit.ly/3Q7eA7k Spring Framework :- https://bit.ly/3xi7buh Design Patterns in Java :- https://bit.ly/3MocXiq Docker :- https://bit.ly/3xjWzLA Blockchain Tutorial :- https://bit.ly/3NSbOkc Corda Tutorial:- https://bit.ly/3thbUKa Hyperledger Fabric :- https://bit.ly/38RZCRB NoSQL Tutorial :- https://bit.ly/3aJpRuc Mysql Tutorial :- https://bit.ly/3thpr4L Data Structures using Java :- https://bit.ly/3MuJa7S Git Tutorial :- https://bit.ly/3NXyCPu Donation: PayPal Id : navinreddy20 https://www.telusko.com