title: How can I add a python tuple to a YAML file using pyYAML?
body: <p>The title is fairly self-explanatory.</p>
  <p>When I save a tuple to a YAML file, I get something that looks like this:</p>
  <pre><code>ambient:  !!python/tuple [0.3, 0.3 ,0.3]
  </code></pre>
  <p>When I try to load it with <code>yaml.safe_load(file_object)</code>, I keep getting an error that reads:</p>
  <pre><code>yaml.constructor.ConstructorError:  could not determine a constructor for the tag 'tag:yaml.org,2002:python/tuple'
  </code></pre>
  <p>What needs to be done?</p>