The __init__() Constructor Function

All classes have the built-in constructor _init_() function that is always executed when a class is being initiated.

obj_name = className()

This is invoked automatically to set a newly created object’s attributes to their initial (default) state.

We can add any number parameters to the constructor (after self). This is optional.

class className():
	# initalize
	def __init__(self, attribute1,...):
		self.attribute1 = attribute1
		...
	...

These arguments are generally used to initialize the instance variables.

Example:

Create a class named Person, use the __init__() function to assign initial values for name and use it in a method.

# A Sample class with init method
class Person:

	# init method or constructor
	def __init__(self, name):
		self.name = name

	# Sample Method
	def say_hi(self):
		print('Hello, my name is', self.name)


p = Person('Nikhil')
p.say_hi()

Output:
Hello, my name is Nikhil

The __init__() function is called automatically every time the class is being used to create a new object.