用python的链表写一份学生管理系统，学生信息包括：学号，姓名，总分，帮我列出代码

以下是用Python链表实现的学生管理系统代码：

class Student:
    def __init__(self, id, name, score):
        self.id = id
        self.name = name
        self.score = score
        self.next = None

class StudentManager:
    def __init__(self):
        self.head = None

    def add_student(self, id, name, score):
        new_student = Student(id, name, score)
        if self.head is None:
            self.head = new_student
        else:
            current = self.head
            while current.next is not None:
                current = current.next
            current.next = new_student

    def search_student(self, id):
        current = self.head
        while current is not None:
            if current.id == id:
                return current
            current = current.next
        return None

    def delete_student(self, id):
        if self.head is None:
            return
        if self.head.id == id:
            self.head = self.head.next
            return
        current = self.head
        while current.next is not None:
            if current.next.id == id:
                current.next = current.next.next
                return
            current = current.next

    def print_students(self):
        current = self.head
        while current is not None:
            print("ID: {}, Name: {}, Score: {}".format(current.id, current.name, current.score))
            current = current.next

以上代码包含了添加学生、查找学生、删除学生和打印所有学生的功能。使用时，可以创建一个`StudentManager`对象，然后调用其方法实现对学生信息的管理。例如：

manager = StudentManager()
manager.add_student(1, "Tom", 80)
manager.add_student(2, "Jerry", 90)
manager.add_student(3, "Alice", 85)
manager.print_students()
student = manager.search_student(2)
if student is not None:
    print("Found student: ID: {}, Name: {}, Score: {}".format(student.id, student.name, student.score))
else:
    print("Student not found")
manager.delete_student(3)
manager.print_students()

输出结果为：

ID: 1, Name: Tom, Score: 80
ID: 2, Name: Jerry, Score: 90
ID: 3, Name: Alice, Score: 85
Found student: ID: 2, Name: Jerry, Score: 90
ID: 1, Name: Tom, Score: 80
ID: 2, Name: Jerry, Score: 90