How to create instance Objects using __init__ in Python?

• The instantiation or calling-a-class-object operation creates an empty object. Many classes like to create objects with instances with a specific initial state. Therefore a class may define a special method named __init__(), as follows −
• def __init__(self) −
•     self.data = [ ]
• When a class defines an __init__() method, class instantiation automatically invokes the newly-created class instance which is obtained by −
• x = MyClass()
• The __init__() method may have arguments. In such a case, arguments given to the class instantiation operator are passed on to __init__(). For example,

>>> class Complex:
...     def __init__(self, realpart, imagpart):
...         self.r = realpart
...         self.i = imagpart
...
>>> x = Complex(4.0, -6.5)
>>> x.r, x.i
(4.0, -6.5)

Rajendra Dharmkar

Published on 12-Jan-2018 11:27:22

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