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Accessing attributes of an instance Accessing classes written in a separate file Calling a Parent Class method from Child Class Having classes that refer to other classes Modifying an attribute value Overriding methods from Parent Class Setting a default attribute value

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Setting a default attribute value in Python

Programming

Python

Classes

Cookbooks

Mar 10, 2022

Last updated

local_offer Python

Example

Below we have a class Concert, where the attribute tickets_remaining of each instance always starts at 5000 when the particular concert is announced.

To define the class Concert with default value of attribute tickets_remaining of 5000:


        
        
            
                
                
                    class Concert:

    def __init__(self, singer, date):
        self.singer = singer
        self.date = date
        self.tickets_remaining = 5000

    def update_tickets_remaining(self, remaining):
        self.tickets_remaining = remaining

Notice that we do not have to provide a value for tickets_remaining when instantiating the object:


        
        
            
                
                
                    acdc = Concert('acdc', '2020-06-01')
print(acdc.tickets_remaining)
                
            
            5000

Published by Arthur Yanagisawa

Edited by 0 others

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