What is the need to init

Question

class Sink:
    def __init__(self, basin, nozzle):
        self.basin = basin
        self.nozzle = nozzle

Why we use or need __init__ method? Why it isn't the same as the code below?

class Sink:
    self.basin = basin
    self.nozzle = nozzle

`__init__` is execute when you create an instance, the so called class body is executed when the class is defined. Both are useful, but for different reasons. — MegaIng, Aug 09 '21 at 20:17
In this second case how is the class suppose to know about `basin` and `nozzle`? — Chris Doyle, Aug 09 '21 at 20:21
In the second piece of code, `self` isn't defined anywhere. Indeed, it raises a `NameError`, why do you *expect* them to be the same? — juanpa.arrivillaga, Aug 09 '21 at 20:38

Subhanshuja · Accepted Answer · 2021-08-17T06:25:28.367

Reference : micropyramid : init is contructor

The function of init is for constructing inside of the class. That website is explained the purpose of init

"init" is a reseved method in python classes. 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.

Example of using init inside class :

class Animal(object):
      def __init__(self, atype, avoice):
          self.type = atype
          self.voice = avoice
      
      def set_type(self):
          #do something in here about type
          if type == "cat":
             return "cat is like walk"
          else:
             return self.type+"is like walk"

      def set_voice(self):
          #do something in here similar with def type

What is the need to __init__

1 Answers1

What is the need to init