class Parent:
    def greet(self):
        print("Hello from Parent")
class Child(Parent):
def greet(self):
print("Hello from Child")
obj = Child()
obj.greet()  # 输出: Hello from Child

class Parent:
    def greet(self):
        print("Hello from Parent")
class Child(Parent):
def greet(self):
super().greet()  # 先调用父类方法
print("Additional behavior in Child")
obj = Child()
obj.greet()
输出:
Hello from Parent
Additional behavior in Child

class Animal:
    def __init__(self, name):
        self.name = name
class Dog(Animal):
def init(self, name, breed):
super().init(name)  # 调用父类构造函数
self.breed = breed

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y
def __str__(self):
    return f"Point({self.x}, {self.y})"
p = Point(1, 2)
print(p)  # 输出: Point(1, 2)