title: python flask disable page for manutention
body: <p>For working in progress reason I need to disabled same page of my project, without change name or comment code. this is my example code :</p>
  
  <pre><code>@app.route('/about')
  def about():
      return render_template('about.html')
  </code></pre>
  
  <p>I need a solution like <code>@disable_page</code>, when put this on page need show to user page_disabled.html. how can I do this?</p>