title: Python Concatenate string with all members of a list and display each display result separated by commas
body: <p>I'm trying to do something like a "conjugator".</p>
  
  <p>Say I have a list of endings:</p>
  
  <pre><code>endings = ['o', 'es', 'e', 'emos', 'eis', 'em']
  </code></pre>
  
  <p>and I have a verb root as a string:</p>
  
  <pre><code>root = "com"
  </code></pre>
  
  <p>The way I thought of doing this is:</p>
  
  <pre><code>for ending in endings:
      print root + ending
  </code></pre>
  
  <p>which outputs:</p>
  
  <pre><code>como
  comes
  come
  comemos
  comeis
  comem
  </code></pre>
  
  <p>But my desired result is:</p>
  
  <pre><code>como, comes, come, comemos, comeis, comem
  </code></pre>
  
  <p>How can I achieve exactly this (and with no quotes around each of the resulting items, and no comma after the last item)?</p>