用python flask框架写一个学生管理系统

好的，下面是一个使用 Flask 框架编写的学生管理系统的 Python 代码演示：

from flask import Flask, render_template, request

app = Flask(__name__)

students = []

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

@app.route('/')
def index():
    return render_template('index.html')

@app.route('/add_student', methods=['POST'])
def add_student():
    name = request.form['name']
    age = request.form['age']
    gender = request.form['gender']
    grade = request.form['grade']
    student = Student(name, age, gender, grade)
    students.append(student)
    return render_template('add_student.html', name=name)

@app.route('/search_student', methods=['GET', 'POST'])
def search_student():
    if request.method == 'POST':
        name = request.form['name']
        for student in students:
            if student.name == name:
                return render_template('search_student.html', student=student)
        return render_template('search_student.html', error='未找到该学生！')
    else:
        return render_template('search_student.html')

@app.route('/remove_student', methods=['GET', 'POST'])
def remove_student():
    if request.method == 'POST':
        name = request.form['name']
        for student in students:
            if student.name == name:
                students.remove(student)
                return render_template('remove_student.html', name=name)
        return render_template('remove_student.html', error='未找到该学生！')
    else:
        return render_template('remove_student.html')

@app.route('/show_all_students')
def show_all_students():
    return render_template('show_all_students.html', students=students)

if __name__ == '__main__':
    app.run()

这个学生管理系统使用了 Flask 框架，包含了添加学生、查找学生、删除学生、显示所有学生等功能，并使用了模板引擎来渲染页面。你可以根据自己的需求对这个代码进行修改和完善。注意在运行之前，需要在终端中使用 pip 安装 Flask 模块。