帮我用python写一个可以将每次增加、删除和修改学生信息后的结果保存至本地文件中，并在程序开启时尝试从本地文件读取学生信息，以便实现程序重启后仍然能够查询原有数据，按学号从小到大输出，学生信息包含有姓名，学号，性别，年龄，手机号，班级，身份证号码，并标注上注释

好的，以下是一个简单的实现方式：

import json

# 文件名
FILENAME = "students.json"

# 学生类
class Student:
    def __init__(self, name, id, gender, age, phone, cls, id_card):
        self.name = name
        self.id = id
        self.gender = gender
        self.age = age
        self.phone = phone
        self.cls = cls
        self.id_card = id_card

    def to_dict(self):
        # 将学生对象转为字典
        return {
            "name": self.name,
            "id": self.id,
            "gender": self.gender,
            "age": self.age,
            "phone": self.phone,
            "class": self.cls,
            "id_card": self.id_card
        }

# 学生信息管理类
class StudentManager:
    def __init__(self):
        self.students = []  # 学生列表

        # 尝试从文件中读取学生信息
        try:
            with open(FILENAME, "r") as f:
                data = json.load(f)
                for s in data:
                    student = Student(s["name"], s["id"], s["gender"], s["age"], s["phone"], s["class"], s["id_card"])
                    self.students.append(student)
        except:
            pass

    def add_student(self, student):
        # 添加学生
        self.students.append(student)
        self.save_to_file()

    def remove_student(self, student):
        # 删除学生
        self.students.remove(student)
        self.save_to_file()

    def modify_student(self, student, new_info):
        # 修改学生信息
        student.name = new_info.get("name", student.name)
        student.id = new_info.get("id", student.id)
        student.gender = new_info.get("gender", student.gender)
        student.age = new_info.get("age", student.age)
        student.phone = new_info.get("phone", student.phone)
        student.cls = new_info.get("cls", student.cls)
        student.id_card = new_info.get("id_card", student.id_card)
        self.save_to_file()

    def save_to_file(self):
        # 将学生信息保存到文件中
        data = [s.to_dict() for s in self.students]
        with open(FILENAME, "w") as f:
            json.dump(data, f)

    def print_students(self):
        # 按学号从小到大输出学生信息
        sorted_students = sorted(self.students, key=lambda s: s.id)
        for s in sorted_students:
            print(s.name, s.id, s.gender, s.age, s.phone, s.cls, s.id_card)

# 测试
if __name__ == "__main__":
    sm = StudentManager()
    sm.add_student(Student("张三", "1001", "男", 18, "13888888888", "一班", "110101200001011234"))
    sm.add_student(Student("李四", "1002", "女", 19, "13999999999", "一班", "110101200002022345"))
    sm.print_students()
    print()

    sm.modify_student(sm.students[0], {"phone": "13666666666"})
    sm.remove_student(sm.students[1])
    sm.print_students()

其中，我们使用了 `json` 模块将学生信息保存到文件中，并在程序启动时尝试从文件中读取数据。同时，我们也实现了添加、删除和修改学生信息的功能。最后，我们按学号从小到大输出学生信息。