Python ClassesLesson 39Free preview

Python init Method

This lesson is part of Python · All levels

Summary

The __init__ method is a constructor that is automatically executed whenever an object is created from a class. The main function is to initialize the instance attribute receiving the value given when calling a class. With __init__, each object is directly filled with initial data so that it is ready to use without separate manual settings.

Key points

__init__ is executed automatically when the object is created, with self as the first parameter.
The argument given when calling a class is accepted by the __init__ parameter other than self.
The entrance self.x = x stores the value to the instance attribute so that it can be used by other methods.
Special lines of reading methods such as __init__ are called dunder or magic methods.

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