Multiple inheritance in python python tutorial day 79

Published: 20 August 2024
on channel: CodeTube

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python tutorial day 79: multiple inheritance

in python, multiple inheritance is a feature that allows a class to inherit attributes and methods from more than one parent class. this can lead to a more complex class hierarchy but also offers powerful capabilities for code reuse and organization.

#### understanding multiple inheritance

1. **basic concept**: in multiple inheritance, a class can derive from multiple classes, allowing it to inherit properties and methods from all of them.

2. **mro (method resolution order)**: python uses the c3 linearization algorithm to determine the order in which classes are searched when executing a method. this can help avoid issues like the "diamond problem," where the same method is inherited from multiple classes.

3. **use cases**: multiple inheritance can be useful in scenarios where a class needs to combine functionalities from different sources.

syntax

the syntax for multiple inheritance is straightforward. you simply list the parent classes in parentheses.

example of multiple inheritance

let's look at a practical example to understand how multiple inheritance works in python.

#### code example

explanation of the code

1. **base classes**:
`animal`: a base class with a method `speak()`.
`mammal` and `bird`: both inherit from `animal` but override the `speak()` method to provide specific implementations.

2. **child class**:
`bat`: this class inherits from both `mammal` and `bird`, which means it can access methods from both classes.

3. **method resolution**:
when we call `bat.speak()`, python looks for the `speak()` method in the `bat` class first. since it doesn't exist there, it checks `mammal`, finds it, and returns "roar! i am a mammal".
the `fly()` method is specific to the `bat` class and returns "i can fly!".

4. **mro**: the `mro()` method shows the order in which python looks for methods. in this case, it starts with `bat`, then checks `mammal`, followed by `bir ...

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