#coding=utf-8from flask import Flaskfrom flask.ext.sqlalchemy import SQLAlchemyapp = Flask(__name__)app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///D:/code/t/src/app.db'db = SQLAlchemy(app)class User(db.Model):    id = db.Column(db.Integer, primary_key = True)    user_name = db.Column(db.String(30))        def __init__(self, id, user_name):        self.id = id        self.user_name = user_name            def __repr__(self):        return '
     
      ' % self.user_name@app.route('/')def index():    return 'flask'if __name__ == '__main__':    db.create_all()    app.run(port = 80)