构造函数使用参数调用构造函数

class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def __str__(self):
        return f"Person(name={self.name}, age={self.age})"

class Employee(Person):
    def __init__(self, name, age, salary):
        super().__init__(name, age)  # 调用父类的构造函数
        self.salary = salary

    def __str__(self):
        return f"Employee(name={self.name}, age={self.age}, salary={self.salary})"

person = Person("John", 30)
print(person)  # 输出: Person(name=John, age=30)

employee = Employee("Mike", 25, 5000)
print(employee)  # 输出: Employee(name=Mike, age=25, salary=5000)