sqlalchemy怎么连接MySQL_如何使用SQLAlchemy连接到mysql

我用下面的代码连接mysql使用SQLAlchemy，帮我出正确的代码。我的配置如下：username: root

password: ''

host: localhost

port: 3307

db: logdb

MySQL配置为：

^{pr2}$

代码：from flask import Flask

from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)

app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:@localhost/logdb'

db = SQLAlchemy(app)

class User(db.Model):

id = db.Column(db.Integer, primary_key=True)

username = db.Column(db.String(80), unique=True)

email = db.Column(db.String(120), unique=True)

def __init__(self, username, email):

self.username = username

self.email = email

def __repr__(self):

return '' % self.username

admin = User('root', 'admin')

db.create_all() # In case user table doesn't exists already. Else remove it.

db.session.add(admin)

db.session.commit() # This is needed to write the changes to database

User.query.all()

User.query.filter_by(username='root').first()