title: How do I prevent url query tampering using flask request.args.get?
body: <p>I have a url <code>http://localhost:8000/savings?sv=30</code></p>
  
  <p>In Flask I retrieve the value using Jinja templates to display the value of <code>sv</code> on the screen:</p>
  
  <pre><code>{% set sv = request.args.get('sv', '') %}
  
  &lt;p&gt;{{ sv }}&lt;/p&gt;
  </code></pre>
  
  <p>Is it possible to prevent a user from editing the url to display a different value?</p>