Python - Class Constructor __init__ method - DYclassroom

In this tutorial we will learn about the class __init__ method in Python. We learned about classes and how to create objects using classes in the Python ... : Home SignUp LogIn Tutorial InterviewQuestions App MCQ Games Project Reference Howto AllContent Aptitude Conversion BooleanAlgebra Flowchart IPAddress LogicGates PseudoCode Algorithm BacktrackingAlgorithm DynamicProgramming Graph GreedyAlgorithm RecursionAlgorithm SearchingAlgorithm SearchingPattern SortingAlgorithm WebDev Bootstrap Babel Bower ChartJS CodeMirror CSS ES6 Grunt HTML JavaScript jQuery JWT TinyMCE TypeScript ProgrammingLanguage CProgramming Java PHP Python VersionControl Git Database MongoDB MySQL PostgreSQL Unix/Linux UnixShellProgramming Vim Testing Mocha MochaChai PHPUnit Code Programming JavaScriptCode Design DesignPatterns Sketch Photoshop More... 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WelearnedaboutclassesandhowtocreateobjectsusingclassesinthePython-ClassesandObjectstutorial.Feelfreetocheckthatout. The__init__method The__init__methodisaspecialmethodofaclass. Itisalsocalledtheconstructormethodanditiscalledwhenwecreate(instantiate)anobjectoftheclass. Weusethe__init__methodtoinitialiseclassattributesorcallclassmethods. InthefollowingPythonprogramwearecreatingthe__init__methodinsidetheAwesomeclass. #class classAwesome: #theinitmethod def__init__(self): print("Hellofromthe__init__method.") #objectoftheclass obj=Awesome() Theabovecodewillprintthefollowingoutput. Hellofromthe__init__method. Wegettheaboveoutputbecauseassoonaswecreateanobjectoftheclassthe__init__methodisautomaticallycalled. Pointstonote! Thefirstparameterofthe__init__methodisalwaysself. Theselfreferstotheobjectoftheclassandweuseittoaccessmethodsandclassattributesfrominsidetheclass. Passingargumenttothe__init__method Likeanyothermethodsofaclasswecanalsopassargumentstothe__init__method. InthefollowingPythonprogramwearepassingastringvaluetothe__init__methodatthetimeofcreatinganobject. #class classAwesome: #theinitmethod def__init__(self,name): print("Hellofromthe__init__method.") print("Name:",name) #objectoftheclass obj=Awesome("YusufShakeel") Theabovecodewillgiveusthefollowingoutput. Hellofromthe__init__method. Name:YusufShakeel Callingothermethodsfromthe__init__method Wecancallothermethodsoftheclassfromthe__init__methodbyusingtheselfkeyword. #class classAwesome: #theinitmethod def__init__(self): print("Hellofromthe__init__method.") #callingtheclassmethod self.greetings() #methods defgreetings(self): print("Hellofromthegreetings()method.") #objectoftheclass obj=Awesome() Theabovecodewillprintthefollowingoutput. Hellofromthe__init__method. Hellofromthegreetings()method. Initialiseclasspropertiesinsidethe__init__method Wecancreateclasspropertiesthatarespecifictotheclassobjectsandinitialisetheminsidethe__init__method. InthefollowingPythonprogramwearecreatingAwesomeclassandinitialisingclasspropertynameinsidethe__init__method. #class classAwesome: #classattributecommontoallobjects commonAttr="CommonAttribute" #theinitmethod def__init__(self,name): #classattributefortheobjects self.name=name #methods defgreetings(self): print("Hello%s!"%self.name) #objectoftheclass obj1=Awesome("Tom") obj2=Awesome("Jerry") #output print("Thecommonclassattribute:") print("obj1.commonAttr:",obj1.commonAttr) print("obj2.commonAttr:",obj2.commonAttr) print("Classattributespecifictoobject:") print("obj1.greetings():") obj1.greetings() print("obj2.greetings():") obj2.greetings() Theabovecodewillprintthefollowingoutput. Thecommonclassattribute: obj1.commonAttr:CommonAttribute obj2.commonAttr:CommonAttribute Classattributespecifictoobject: obj1.greetings(): HelloTom! obj2.greetings(): HelloJerry! ←Prev Next→ Share RecentlyUpdated Maximumsubarrayproblem-Kadane'sAlgorithmProgramming MaximumsubarrayproblemProgramming FindmedianofanarrayProgramming FindtheminimumandmaximumnumberinanarrayusingTournamentMethodProgramming FindtheminimumandmaximumnumberinanarrayProgramming ReverseastringProgramming DesignPatterns-StrategyPatternDesignPatterns PostgreSQL-SELECTFROMTablePostgreSQL PostgreSQL-INSERTINTOTablePostgreSQL PostgreSQL-CREATETablePostgreSQL HOME ABOUT CONTACT PRIVACY TERMS STATS SITEMAP BUG Havefunlearning:-) Copyright©2014-2022DYclassroom.Allrightsreserved.