创建一个多个类的朋友的函数

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

    def introduce(self):
        print(f"My name is {self.name}, I am {self.age} years old, and I am a {self.gender}.")

class Student(Person):
    def __init__(self, name, age, gender, grade):
        super().__init__(name, age, gender)
        self.grade = grade

    def introduce(self):
        super().introduce()
        print(f"I am a student in grade {self.grade}.")

class Teacher(Person):
    def __init__(self, name, age, gender, subject):
        super().__init__(name, age, gender)
        self.subject = subject

    def introduce(self):
        super().introduce()
        print(f"I am a teacher of {self.subject}.")

person1 = Person("Alice", 20, "female")
person2 = Student("Bob", 18, "male", 10)
person3 = Teacher("Charlie", 30, "male", "math")

person1.introduce()
person2.introduce()
person3.introduce()