学生管理系统python函数

以下是一个基本的学生管理系统的 Python 函数示例：

def add_student(name, age, grade):
    """添加学生信息"""
    student = {"name": name, "age": age, "grade": grade}
    students.append(student)

def remove_student(name):
    """删除学生信息"""
    for student in students:
        if student["name"] == name:
            students.remove(student)

def update_student(name, new_age=None, new_grade=None):
    """更新学生信息"""
    for student in students:
        if student["name"] == name:
            if new_age:
                student["age"] = new_age
            if new_grade:
                student["grade"] = new_grade

def search_student(name):
    """查询学生信息"""
    for student in students:
        if student["name"] == name:
            return student
    return None

def display_all_students():
    """显示所有学生信息"""
    for student in students:
        print(student)

students = []

add_student("张三", 18, "大一")
add_student("李四", 19, "大二")
display_all_students()

remove_student("张三")
display_all_students()

update_student("李四", new_age=20, new_grade="大三")
display_all_students()

student = search_student("李四")
print(student)

这个示例中包含了添加、删除、更新、查询和显示所有学生信息这些基本操作。当然，这只是一个简单的示例，你可以根据自己的需要对这些函数进行修改和扩展。