我编写了一个 server.py 文件，可以保存学生的姓名、索引号和平均成绩。当我运行client.html文件并输入数据并单击添加学生时，它说学生已成功添加，但是当我输入他的索引以使用获取学生功能时，它说404学生未找到。

这是server.py文件代码：

from flask import Flask, request, jsonify
import pickle

app = Flask(__name__)

try:
    with open('students.pickle', 'rb') as f:
        students = pickle.load(f)
except FileNotFoundError:
    students = {}

@app.route("/")
def index():
    with open("client.html") as f:
        return f.read()

@app.route('/add_student', methods=['POST'])
def add_student():
    name = request.form.get('name')
    surname = request.form.get('surname')
    index = request.form.get('index')
    grade = request.form.get('grade')
    students[index] = {'name': name, 'surname': surname, 'index': index,'grade': grade}

    with open('students.pickle', 'wb') as f:
        pickle.dump(students, f)
        
    return jsonify(message='Student added successfully'), 201

@app.route('/get_student/', methods=['GET'])
def get_student(index):
    student = students.get(index)
    if student:
        return jsonify(student)
    else:
        return 'Student not found', 404

if __name__ == '__main__':
    app.run(host='localhost', port=8000, debug=True)

这是 client.html 文件代码：

    
    


    

        Index:
        
        Get Student
    
    

    

    

        Name:
        
        

        Surname:
        
        

        Index:
        
        

        Grade:
        
        

        Add Student