title: Flask, How to response a string to html?
body: <p>I want to write code to process the user posted data, and return a string type value and show it the page, here is my demo code</p>
  
  <pre><code>def model(...):
      ...
      strs = process(...)
      return render_template('page.html' ...)
  </code></pre>
  
  <p>How can I do that?</p>