Python——类的作用

实例化：基于类来创建对象

形参self——指向实例本身的应用

Example:

class Restaurant():
    """A class representing a restaurant."""

    def __init__(self, name, cuisine_type):
        """Initialize the restaurant."""
        self.name = name.title()
        self.cuisine_type = cuisine_type

    def describe_restaurant(self):
        """Display a summary of the restaurant."""
        msg = self.name + " serves wonderful " + self.cuisine_type + "."
        print("\n" + msg)

    def open_restaurant(self):
        """Display a message that the restaurant is open."""
        msg = self.name + " is open. Come on in!"
        print("\n" + msg)

restaurant = Restaurant('the mean queen', 'pizza')
print(restaurant.name)
print(restaurant.cuisine_type)

restaurant.describe_restaurant()
restaurant.open_restaurant()

pizza

The Mean Queen serves wonderful pizza.

The Mean Queen is open. Come on in!