我想在python-flask中打印来自聚集函数的sqlalchemy查询的值。

from flask import Flask
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = '数据库连接字符串'
db = SQLAlchemy(app)

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50))
    age = db.Column(db.Integer)

@app.route('/')
def index():
    result = db.session.query(db.func.count(User.id)).scalar()
    print(result)
    return 'Hello World'

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