title: Python regex and splitting
body: <p>I have a string like this </p>
  
  <pre><code>mystr = "K1_L1_L2  XX"
  </code></pre>
  
  <p>I want to break it to the following format </p>
  
  <pre><code>K1 L1 L2  XX
  </code></pre>
  
  <p>where K1, L1, L2 can be anything but have this format of a char followed by a number. I am doing this in python using the following regex:</p>
  
  <pre><code>a = "K1_L1_L2  XX"
  re.split("[\c\d\_]+",a)
  </code></pre>
  
  <p>which gives me the following output</p>
  
  <pre><code>['K', 'L', 'L', '  ', '.', '']
  </code></pre>
  
  <p>but I want something like this </p>
  
  <pre><code>['K1', 'L1', 'L2', '  ', '.', '']
  </code></pre>
  
  <p>what is the possible workaround?</p>