Python self reference declaration

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In Python self reference is used within class methods to refer to the instance of the class itself. It is a conventional name used for the first parameter of instance methods and is automatically passed when the method is called.

When defining a method within a class, the first parameter is typically named self, although you can technically choose any valid variable name. The self parameter represents the instance of the class and allows you to access its attributes and invoke other methods on it.

Here’s an example to illustrate the usage of self within a class:

class MyClass:
    def __init__(self, value):
        self.value = value

    def display(self):
        print("Value:", self.value)

    def multiply(self, factor):
        self.value *= factor

# Creating an instance of MyClass
obj = MyClass(10)

# Accessing instance attribute using self
obj.display()  # Output: Value: 10

# Invoking a method on the instance

# Accessing the modified instance attribute
obj.display()  # Output: Value: 30

In the example above, the MyClass class has an __init__ method that takes a value parameter and assigns it to the value attribute of the instance using self. The display method uses self.value to access and display the value attribute of the instance. The multiply method multiplies the value attribute of the instance by the provided factor using self.value.

By using self within the class methods, you can refer to the instance and access its attributes and methods. It allows you to work with the specific instance of the class on which the method is called, enabling object-oriented programming principles such as encapsulation and data manipulation.

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Lingaraj Senapati

Hey There! I am Lingaraj Senapati, the Founder of My skills are Freelance, Web Developer & Designer, Corporate Trainer, Digital Marketer & Youtuber.

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