Python flask web框架学习

最新推荐文章于 2024-05-28 13:22:26 发布

原创最新推荐文章于 2024-05-28 13:22:26 发布 · 793 阅读

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#python #flask

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本文介绍了使用Flask框架进行Web应用开发的基本步骤，包括数据库配置、初始化加载、路由定义及视图函数实现等核心内容。

1.数据库配置

#configuration
current_dir = os.getcwd()
DATABASE = current_dir + "\weibo.db"
DEBUG = True
SECRET_KEY = secret_key
USERNAME = 'admin'
PASSWORD = '010110'

2.部分内容的初始化加载

#create our little application
app = Flask(__name__)
app.config.from_object(__name__)

def init_db():
    with closing(connect_db()) as db:
        with app.open_resource('schema.sql', mode='r') as f:
            db.cursor().executescript(f.read())
        db.commit()

def connect_db():
    return sqlite3.connect(app.config['DATABASE'])

@app.before_request
def before_request():
    g.db = connect_db()

@app.teardown_request
def teardown_request(exception):
    db = getattr(g, 'db', None)
    if db is not None:
        db.close()
    g.db.close()

3.路由定义

@app.route('/')

@app.route('/add', methods=['POST'])

4.视图函数

@app.route('/')
def show_entries():
    cur = g.db.execute('select title, text from entries order by desc')
    entries = [dict(title=row[0], text=row[1]) for row in cur.fetchall()]
    return render_template('show_entries.html', entries=entries)

@app.route('/add', methods=["POST"])
def add_entry():
    if not session.get('logged_in'):
        abort(401)
    g.db.execute('insert into entries (title, text) values (?, ?)', [request.form['title'], request.form['text']])
    g.db.commit()
    flash('New entry was successfully posted')
    return redirect(url_for('show_entries'))

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初次了解flask框架，如有不足请多多指教