Removing character from a list of words : <p>I have a list of strings like below.</p>

<pre><code>arr = ['U.S.A','Ph.D','Mr.']
</code></pre>

<p>I would like to clean this array of the period so that the output would be like</p>

<pre><code>arr = ['USA','PhD','Mr']
</code></pre>

<p>Is there a clean regex way to do this?</p>
