用python写学生信息管理系统

好的，下面是一个简单的学生信息管理系统的 Python 代码：

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

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

    def add_student(self, student):
        self.students.append(student)
        print("添加成功！")

    def delete_student(self, id):
        for student in self.students:
            if student.id == id:
                self.students.remove(student)
                print("删除成功！")
                return
        print("未找到该学生！")

    def search_student(self, id):
        for student in self.students:
            if student.id == id:
                print("姓名：{}，年龄：{}，性别：{}，学号：{}".format(student.name, student.age, student.gender, student.id))
                return
        print("未找到该学生！")

    def modify_student(self, id, name=None, age=None, gender=None):
        for student in self.students:
            if student.id == id:
                if name:
                    student.name = name
                if age:
                    student.age = age
                if gender:
                    student.gender = gender
                print("修改成功！")
                return
        print("未找到该学生！")

    def show_students(self):
        print("所有学生信息：")
        for student in self.students:
            print("姓名：{}，年龄：{}，性别：{}，学号：{}".format(student.name, student.age, student.gender, student.id))

def main():
    sms = StudentManagementSystem()
    while True:
        print("1. 添加学生")
        print("2. 删除学生")
        print("3. 查找学生")
        print("4. 修改学生信息")
        print("5. 显示所有学生信息")
        print("6. 退出系统")
        choice = input("请输入您的选择：")
        if choice == "1":
            name = input("请输入学生姓名：")
            age = input("请输入学生年龄：")
            gender = input("请输入学生性别：")
            id = input("请输入学生学号：")
            student = Student(name, age, gender, id)
            sms.add_student(student)
        elif choice == "2":
            id = input("请输入要删除的学生学号：")
            sms.delete_student(id)
        elif choice == "3":
            id = input("请输入要查找的学生学号：")
            sms.search_student(id)
        elif choice == "4":
            id = input("请输入要修改信息的学生学号：")
            name = input("请输入修改后的学生姓名（不修改请按回车）：")
            age = input("请输入修改后的学生年龄（不修改请按回车）：")
            gender = input("请输入修改后的学生性别（不修改请按回车）：")
            sms.modify_student(id, name, age, gender)
        elif choice == "5":
            sms.show_students()
        elif choice == "6":
            print("感谢使用！")
            break
        else:
            print("输入有误，请重新输入！")

if __name__ == "__main__":
    main()

这个学生信息管理系统包括了添加、删除、查找、修改和显示所有学生信息的功能。你可以根据自己的需求进行修改和扩展。