title: UnicodeDecodeError from app.py after input from HTML
body: <p>I am currently building an application with python and the module flask. I've created an input form in my HTML file and when I write something that doesn't contain "åäö", it works. It will communicate with my PSQL. But if I write something that contains "åäö", it will say:</p>
  
  <pre><code>UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position
  </code></pre>
  
  <p>in my app.py file. I think there is a problem with my PSQL table but I don't know.</p>
  
  <p>What's the problem?</p>
  
  <p>I appreciate all help that I get.
  Thanks in advance.</p>