're likely to cause a crash. Boost.Python detects this
    situation at runtime and helpfully throws an exception instead of letting
    you do that.<br>
     &nbsp;</p>
    <hr>

    <h2><a name="question1"></a>Is return_internal_reference efficient?</h2>

    <blockquote>
      <b>Q:</b> <i>I have an object composed of 12 doubles. A const&amp; to
      this object is returned by a member function of another class. From the
      viewpoint of using the returned object in Python I do not care if I get
     