title: Convert list of dicts to string
body: <p>I'm very new to Python, so forgive me if this is easier than it seems to me.</p>
  
  <p>I'm being presented with a list of dicts as follows:</p>
  
  <pre><code>[{'directMember': 'true', 'memberType': 'User', 'memberId': 'address1@example.com'},  
   {'directMember': 'true', 'memberType': 'User', 'memberId': 'address2@example.com'},  
   {'directMember': 'true', 'memberType': 'User', 'memberId': 'address3@example.com'}]
  </code></pre>
  
  <p>I would like to generate a simple string of memberIds, such as</p>
  
  <blockquote>
    <p>address1@example.com,
    address2@example.com,
    address3@example.com</p>
  </blockquote>
  
  <p>but every method of converting a list to a string that I have tried fails because dicts are involved.</p>
  
  <p>Any advice?</p>