Python设计一个小型学生管理系统

Python是一种简单易学且功能强大的编程语言，适合用于开发小型学生管理系统。下面是一个简单的Python学生管理系统的设计思路：

1. 定义学生类，包含学生基本信息和成绩信息。
2. 定义管理类，包含添加学生、删除学生、修改学生信息和查询学生信息等操作。
3. 将学生信息存储在文件中。

以下是一个简单的实现示例：

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

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

    def add_student(self, student):
        self.students.append(student)

    def remove_student(self, id):
        for student in self.students:
            if student.id == id:
                self.students.remove(student)
                break

    def modify_student(self, id, name, age, gender, score):
        for student in self.students:
            if student.id == id:
                student.name = name
                student.age = age
                student.gender = gender
                student.score = score
                break

    def search_student(self, id):
        for student in self.students:
            if student.id == id:
                return student

    def show_all(self):
        for student in self.students:
            print(f'ID: {student.id}, Name: {student.name}, Age: {student.age}, Gender: {student.gender}, Score: {student.score}')

    def save_to_file(self):
        with open('students.txt', 'w') as f:
            for student in self.students:
                f.write(f'{student.id},{student.name},{student.age},{student.gender},{student.score}\n')

    def load_from_file(self):
        try:
            with open('students.txt', 'r') as f:
                lines = f.readlines()
                for line in lines:
                    data = line.strip().split(',')
                    student = Student(data, data, data, data, data)
                    self.add_student(student)
        except FileNotFoundError:
            pass

manager = Manager()
manager.load_from_file()

while True:
    print('1. Add student')
    print('2. Remove student')
    print('3. Modify student')
    print('4. Search student')
    print('5. Show all students')
    print('6. Save to file')
    print('7. Exit')

    choice = input('Please enter your choice: ')

    if choice == '1':
        id = input('Please enter ID: ')
        name = input('Please enter name: ')
        age = input('Please enter age: ')
        gender = input('Please enter gender: ')
        score = input('Please enter score: ')
        student = Student(id, name, age, gender, score)
        manager.add_student(student)
    elif choice == '2':
        id = input('Please enter ID: ')
        manager.remove_student(id)
    elif choice == '3':
        id = input('Please enter ID: ')
        name = input('Please enter new name: ')
        age = input('Please enter new age: ')
        gender = input('Please enter new gender: ')
        score = input('Please enter new score: ')
        manager.modify_student(id, name, age, gender, score)
    elif choice == '4':
        id = input('Please enter ID: ')
        student = manager.search_student(id)
        if student:
            print(f'ID: {student.id}, Name: {student.name}, Age: {student.age}, Gender: {student.gender}, Score: {student.score}')
        else:
            print('Student not found.')
    elif choice == '5':
        manager.show_all()
    elif choice == '6':
        manager.save_to_file()
    elif choice == '7':
        break