学生信息管理系统Python代码

以下是一个简单的学生信息管理系统的Python代码示例：

students = []  # 初始为空的学生列表

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

# 显示所有学生信息
def show_students():
    for student in students:
        print("Name: ", student["name"])
        print("Age: ", student["age"])
        print("Grade: ", student["grade"])
        print()

# 搜索学生信息
def search_student(name):
    for student in students:
        if student["name"] == name:
            print("Name: ", student["name"])
            print("Age: ", student["age"])
            print("Grade: ", student["grade"])
            print()
            return
    print("Student not found.")

# 删除学生信息
def delete_student(name):
    for student in students:
        if student["name"] == name:
            students.remove(student)
            print("Student deleted.")
            return
    print("Student not found.")

# 更新学生信息
def update_student(name, age, grade):
    for student in students:
        if student["name"] == name:
            student["age"] = age
            student["grade"] = grade
            print("Student information updated.")
            return
    print("Student not found.")

# 主程序
while True:
    print("1. Add student")
    print("2. Show all students")
    print("3. Search student")
    print("4. Delete student")
    print("5. Update student information")
    print("6. Exit")

    choice = int(input("Enter your choice: "))

    if choice == 1:
        name = input("Enter name: ")
        age = int(input("Enter age: "))
        grade = input("Enter grade: ")
        add_student(name, age, grade)

    elif choice == 2:
        show_students()

    elif choice == 3:
        name = input("Enter student name to search: ")
        search_student(name)

    elif choice == 4:
        name = input("Enter student name to delete: ")
        delete_student(name)

    elif choice == 5:
        name = input("Enter student name to update: ")
        age = int(input("Enter new age: "))
        grade = input("Enter new grade: ")
        update_student(name, age, grade)

    elif choice == 6:
        break

    else:
        print("Invalid choice.")

此代码使用一个学生列表来存储所有学生信息，并提供了添加、显示、搜索、删除和更新学生信息的功能。在主程序中，用户可以选择要执行的操作。