Why init python

It is known as a constructor in object oriented concepts. This method called when an object is created from the class and it allow the class to initialize the attributes of a class. Let's consider that you are creating a NFS game. We have created two different types of car objects with the same class. Here, the magic keyword "self" represents the instance of the class. It binds the attributes with the given arguments.

It costs x rupees per 1 square unit. I think they might be OOP constructs, but I don't know very much. Improve this question. Add a comment. Active Oldest Votes. Improve this answer. Chris B. It's like a static variable. It's only initialized once, and it's available through A. Note that overriding it on a specific class will not affect the base, so A. It's worth pointing out that the first argument need not necessarily be called self , it just is by convention.

What's the point of object in the class declaration? I've noticed some classes have this and some don't — Chris. Chris It's for Python 2 compatibility. In Python 3 there is no need to explicitly inherit from object because it happens by default. Show 3 more comments. Yep, you are right, these are oop constructs. So then is there any reason why you wouldn't want self to be in the constructor? Why do you even have to specify it, wouldn't it be better if it was implicit?

For those who read this answer, it is completely wrong. It is expected to initialize instance attributes. It doesn't say init allocates memory, it says it is called when memory is allocated. Perhaps worth clarifying by changing "when" to "after" : — RedBlueThing. Community Bot 1 1 1 silver badge. Dave Everitt Dave Everitt Interesting observation but I think you are on the wrong track.

With print MyClass. Where as with a. It seems to me that init is just a constructor that is first executed when you create an object of the class. While instance variables can have different values for each instance of the class, the class variables are the same across all instances created from that class. Of course one can also change the class variables within the code. So the correct terminology for 'static' variable is object variable and instance variables are declared inside a class method in this case the init method, but could be also another method of course.

In short: self as it suggests, refers to itself - the object which has called the method. That is, if you have N objects calling the method, then self. The basic idea is that it is a special method which is automatically called when an object of that Class is created.

Asclepius Class objects support two kinds of operations: attribute references and instantiation Attribute references use the standard syntax used for all attribute references in Python: obj. Total fruitty bill is",self. Harvey Harvey 8, 4 4 gold badges 58 58 silver badges 64 64 bronze badges.

SilentGhost k 61 61 gold badges silver badges bronze badges. Wow, thats an eye opener for this java guy. Reusable piece of python functionality for wrapping arbitrary blocks of code : Python Context Managers. Python program to check if the list contains three consecutive common numbers in Python. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide.

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What is a class?