系统中存在学生和老师两类对象，支持可查询学生姓名、性别和年龄信息且可对学生多门成绩求平均；可查询老师姓名、性别和年龄信息且可对老师所带课程所有学生成绩求平均。编写程序测试这两个类的功能，同时使用类的继承提升代码复用效率

在这个系统中，我们可以创建两个基类`Person`和`Scoreable`，分别代表人（学生和老师）的基本信息，并实现公共的方法。然后，为学生和老师各自创建子类，继承自这两个基类，增加专属字段和方法。接下来，我们编写测试代码来展示功能和复用性。

首先，定义基类：

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

    def display_info(self):
        return f"Name: {self.name}, Gender: {self.gender}, Age: {self.age}"


class Scoreable:
    def __init__(self):
        self.score_list = []

    def add_score(self, score):
        self.score_list.append(score)

    def average_score(self):
        if not self.score_list:
            return None
        return sum(self.score_list) / len(self.score_list)


# 学生类继承自Person和Scoreable
class Student(Person, Scoreable):
    def __init__(self, name, gender, age, scores=None):
        super().__init__(name, gender, age)
        if scores is not None:
            self.add_scores(scores)


# 老师类继承自Person
class Teacher(Person):
    def __init__(self, name, gender, age, courses=None):
        super().__init__(name, gender, age)
        if courses is not None:
            for course, student_scores in courses.items():
                for student, score in student_scores.items():
                    self.add_student_score(course, student, score)

    def add_student_score(self, course, student, score):
        if course not in self.score_list:
            self.score_list[course] = {}
        self.score_list[course][student] = score


# 测试代码
def test_students():
    tom = Student("Tom", "Male", 18, [85, 90, 92])
    tom.display_info()  # 输出学生信息
    avg_score = tom.average_score()  # 求平均分
    print(f"Average score: {avg_score}")

def test_teachers():
    john = Teacher("John", "Male", 35, {"Math": {"Alice": 88, "Bob": 94}})
    john.display_info()  # 输出老师信息
    for course, students_scores in john.score_list.items():
        avg_course_score = sum(students_scores.values()) / len(students_scores)
        print(f"{course} average score: {avg_course_score}")

test_students()
test_teachers()