How can I use pattern matching in Python 3.10 classes?

How can I use pattern matching in Python 3.10 classes?

In Python 3.10, you can use the match statement to perform pattern matching in classes. This allows you to match the structure of objects and extract data easily.

Can you show me a simple example?

Sure! Here's a basic example:

class Shape:
    def __init__(self, type):
        self.type = type

    def match_shape(self):
        match self:
            case Circle(radius):
                return f'Circle with radius {radius}'
            case Square(side):
                return f'Square with side {side}'
            case _:
                return 'Unknown shape'

What if I want to match multiple attributes?

You can match multiple attributes by using nested patterns. For example:

class Rectangle:
    def __init__(self, width, height):
        self.width = width
        self.height = height

    def match_rectangle(self):
        match self:
            case Rectangle(width=w, height=h) if w == h:
                return 'This is a square!'
            case Rectangle(width=w, height=h):
                return f'Rectangle {w}x{h}'