title: valueError zero length field name in format
body: <p>I am using python version 2.7.3 and im trying to print out some information with a certain format.</p>
  
  <pre><code>final="&lt;".join('&lt; {} &gt;'.format(' '.join(items)) for items in list)
  </code></pre>
  
  <p>But i got a valueError zero length field name in format error, is this because my python version does not allow certain syntaxs? </p>