title: UnicodeEncodeError odoo 9
body: <p>This is my code in .py file:</p>
  
  <pre><code>description_val = str(self.description)
  </code></pre>
  
  <p>also I'm try:</p>
  
  <pre><code>description_val = str(self.description).encode('utf-8').decode('utf-8')
  </code></pre>
  
  <p>I don't ignore special character et. Malmö  --> Malm</p>
  
  <p>Get this error:</p>
  
  <p>UnicodeEncodeError: 'ascii' codec can't encode character u'\u0160' in position 2: ordinal not in range(128)</p>
  
  <p>How fix this issue?</p>