帮我写一个学生成绩查询统计系统的代码，要求有录入，排序，查找，统计功能

好的，以下是一个简单的学生成绩查询统计系统的代码，希望能帮到你：

class Student:
    def __init__(self, name, score):
        self.name = name
        self.score = score

class ScoreSystem:
    def __init__(self):
        self.students = []

    def add_student(self, name, score):
        student = Student(name, score)
        self.students.append(student)

    def sort_by_score(self):
        self.students.sort(key=lambda x: x.score, reverse=True)

    def search_student(self, name):
        for student in self.students:
            if student.name == name:
                return student
        return None

    def get_average_score(self):
        total_score = sum(student.score for student in self.students)
        return total_score / len(self.students)

    def get_max_score(self):
        return max(student.score for student in self.students)

    def get_min_score(self):
        return min(student.score for student in self.students)


if __name__ == '__main__':
    score_system = ScoreSystem()

    score_system.add_student("张三", 80)
    score_system.add_student("李四", 90)
    score_system.add_student("王五", 85)

    score_system.sort_by_score()

    print("按成绩排序后：")
    for student in score_system.students:
        print(student.name, student.score)

    search_name = "李四"
    search_result = score_system.search_student(search_name)
    if search_result:
        print("查找到学生：", search_result.name, search_result.score)
    else:
        print("未找到学生：", search_name)

    average_score = score_system.get_average_score()
    print("平均分：", average_score)

    max_score = score_system.get_max_score()
    print("最高分：", max_score)

    min_score = score_system.get_min_score()
    print("最低分：", min_score)

代码中，我们定义了一个 `Student` 类来保存学生的姓名和成绩，以及一个 `ScoreSystem` 类来实现添加学生、按成绩排序、查找学生、统计平均分、最高分、最低分等功能。在 `main` 函数中，我们先添加了三个学生的信息，然后按成绩排序输出，接着查找李四的成绩，输出平均分、最高分、最低分等统计信息。