from flask import Flask
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATEBASE_URL'] = 'mysql://root:@127.0.0.1/net_news?charset=utf8'
db = SQLAlchemy(app)

class News(db.Model):
    __tablename__ = 'news'
    
    ID = db.Column(db.Integer, primary_key = True) #如果数据库中的表格id 标签为“XXid” 则需要在Column()里标明
    title = db.Column(db.String(200), nullable = False)
    content = db.Column(db.String(2000), nullable = False)
    types = db.Column(db.String(10), nullable = False)
    image = db.Column(db.String(300))
    author = db.Column(db.String(20))
    view_count = db.Column(db.Integer)
    crate_time = db.Column(db.DateTime)
    is_valid = db.Column(db.Boolean)

    def __repr__(self):
        return '<News %/r>' % self.title

def main():
    db.create_all()
if __name__ == '__main__':
    main()

老师，运行上述代码，出现如下错误，感觉错在创建表 db.create_all（）这一段，那到底该如何很好的去实现（不太习惯在cmd中使用）

C:\Users\560\Anaconda3\lib\site-packages\flask_sqlalchemy\__init__.py:774: UserWarning: Neither SQLALCHEMY_DATABASE_URI nor SQLALCHEMY_BINDS is set. Defaulting SQLALCHEMY_DATABASE_URI to "sqlite:///:memory:".   'Neither SQLALCHEMY_DATABASE_URI nor SQLALCHEMY_BINDS is set. '

C:\Users\560\Anaconda3\lib\site-packages\flask_sqlalchemy\__init__.py:794: FSADeprecationWarning: SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future.  Set it to True or False to suppress this warning.      'SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and '

还有就是这个Flask-SQLAlchemy的中文说明书用的是from flask.ext.sqlalchemy import SQLAlchemy                    这与flask_sqlachemy有什么区别么

 http://docs.jinkan.org/docs/flask-sqlalchemy/quickstart.html#id2