title: Python DocString (Google Style): How to document class attributes?
body: <p>I have this small example:</p>
  <pre><code>&quot;&quot;&quot;Sandbox module&quot;&quot;&quot;
  
  class Toto:
      &quot;&quot;&quot;
      This class is an example
  
      Attributes:
          class_attribute (str): The class attribute #Unresolved reference
          instance_attribute (str): The instance attribute #OK
      &quot;&quot;&quot;
  
      class_attribute = &quot;&quot;
  
      def __init__(self):
          self.instance_attribute = &quot;&quot;
          pass
  </code></pre>
  <p>This triggers an unresolved reference warning
  How should I properly document the class attribute ?</p>