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Python class constructor
Python class constructor








python class constructor

it initializes three "instance variables". Print(animals)Animals _init_() method now has to do something special. All lions are also Animals, but not all Animals are lions. All lions are lions and they are carnivores. Not an accurate representation of animals. All Animals will be named "lion" and will be "Carnivorous". In your example, type and name are class variables. I think a better description of _init_() is "initializer".

PYTHON CLASS CONSTRUCTOR HOW TO

After _new_() an instance knows how to act like an instance of the class, it just doesn't have any instance variables. I think _new_() is a better fit for "constructor". It lets you add some code that you want to execute before any other method other than _new_(). _init_() is a method that gets called after the instance is constructed. I have seen the following example: Class Animal : So what is the point of explicitly including _init_ into the class definition if it works by itself anyway? That said, we can also create a class without including the constructor _init_ and still create attributes that all objects will haves.What happens it we don't include the _init_ method? We don't get an error: the _init_ special method is automatically called anyway as the "default constructor".

python class constructor

Self indicates all potential and future instances of the class.

python class constructor

However, initialization in this case does not mean assigning a specific value to the attributes.Within the class definition, the constructor refers to the specific attributes and methods using the argument self. The name _init_ stands for initialization because it sets the attributes/methods that every object will have. The _init_ method is called anytime an object is created: it constructs objects. We can create a class and include, at the very beginning, the _init_ special method called the constructor which can be parametrized or not.










Python class constructor