title: How can I use python itertools.groupby() to group a list of strings by their first character?
body: <p>I have a list of strings similar to this list:</p>
  
  <pre><code>tags = ('apples', 'apricots', 'oranges', 'pears', 'peaches')
  </code></pre>
  
  <p>How should I go about grouping this list by the first character in each string using itertools.groupby()? How should I supply the 'key' argument required by itertools.groupby()?</p>