scikit-learn: use classifier from older version
<p>I have a pickled scikit-learn classifier trained in version 0.14.1, and I want to use it on my mac which has scikit-learn version 0.17.1. When I try to run clf.score I get the following error:</p>

<pre><code>AttributeError: 'SVC' object has no attribute '_dual_coef_'
</code></pre>

<p>Googling this it looks like the problem is with the difference in version between making the classifier and now wanting to test it. If retraining is not an option, is there a way to upgrade the classifier to work in the new version of scikit-learn?</p>