Python remove last character of string if its a letter
<p>How do I remove the last character of a string if its a letter.</p>

<p>e.g if I had the following strings.</p>

<pre><code>my_string = 'ABC 1.1 A'
my_string2 = 'ABC 1.1 B'
my_string3 = 'DEF 1'
</code></pre>

<p>I would want <code>my_string = 'ABC 1.1'</code>, <code>my_string2 = 'ABC 1.1'</code>, and <code>my_strin3 = 'DEF 1'</code></p>

<p>These strings are generated from DB so it would not be a manual process.</p>
