title: S3 boto library: How to do a HEAD request on the Key in the bucket
body: <p>I am new to Boto and using <code>boto2.29.1</code> in python.</p>
  
  <p>Added some user metadata using <code>set_metadata</code> method</p>
  
  <p>Listing all keys in s3 bucket by using <code>bucket.list()</code> method then iterating over keys. But it does not return user metadata as defined in <a href="http://boto.cloudhackers.com/en/latest/ref/s3.html" rel="noreferrer">API reference</a></p>
  
  <p>But getting metadata using <code>bucket.get_key()</code> returns metadata</p>
  
  <p>API reference says get metadata by doing HEAD request on key. How can i do this?</p>